| Commit message (Collapse) | Author | Age |
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git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
. revert 20b279 - require exclude_guest to use PEBS - kernel side, now
older binaries will continue working for things like cycles:pp
without needing to pass extra modifiers, from David Ahern.
. Fix building from 'make perf-*-src-pkg' tarballs, broken by UAPI,
from Sebastian Andrzej Siewior
[ Pulling directly, Ingo would normally pull but has been unresponsive ]
* tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
perf tools: Fix building from 'make perf-*-src-pkg' tarballs
perf x86: revert 20b279 - require exclude_guest to use PEBS - kernel side
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Thanks (mostly) to uapi the package created from perf-*-src-pkg FTBFS:
| CC perf.o
|In file included from util/../perf.h:8:0,
| from util/cache.h:7,
| from perf.c:12:
|arch/x86/include/asm/unistd.h:4:29: fatal error: uapi/asm/unistd.h: No such file or directory
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| CC perf.o
|In file included from util/../perf.h:106:0,
| from util/cache.h:7,
| from perf.c:12:
|include/linux/perf_event.h:17:35: fatal error: uapi/linux/perf_event.h: No such file or directory
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| CC perf.o
|In file included from include/uapi/linux/perf_event.h:19:0,
| from util/../perf.h:106,
| from util/cache.h:7,
| from perf.c:12:
|util/include/asm/byteorder.h:2:49: fatal error: ../../../../include/uapi/linux/swab.h: No such file or directory
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| CC perf.o
|In file included from util/include/../../../../include/linux/list.h:7:0,
| from util/include/linux/list.h:4,
| from util/parse-events.h:7,
| from perf.c:15:
|util/include/linux/const.h:1:50: fatal error: ../../../../include/uapi/linux/const.h: No such file or directory
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|In file included from builtin-kvm.c:26:0:
|arch/x86/include/asm/svm.h:4:26: fatal error: uapi/asm/svm.h: No such file or directory
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|In file included from util/evsel.c:21:0:
|include/linux/hw_breakpoint.h:5:38: fatal error: uapi/linux/hw_breakpoint.h: No such file or directory
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| CC util/evsel.o
|In file included from util/perf_regs.h:5:0,
| from util/evsel.c:23:
|arch/x86/include/perf_regs.h:6:27: fatal error: asm/perf_regs.h: No such file or directory
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| CC util/rbtree.o
|In file included from ../../lib/rbtree.c:24:0:
|util/include/linux/rbtree_augmented.h:2:56: fatal error: ../../../../include/linux/rbtree_augmented.h: No such file or directory
This patch adds the missing files.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1357654134-28538-1-git-send-email-bigeasy@linutronix.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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This patch is brought to you by the letter 'H'.
Commit 20b279 breaks compatiblity with older perf binaries when run with
precise modifier (:p or :pp) by requiring the exclude_guest attribute to be
set. Older binaries default exclude_guest to 0 (ie., wanting guest-based
samples) unless host only profiling is requested (:H modifier). The workaround
for older binaries is to add H to the modifier list (e.g., -e cycles:ppH -
toggles exclude_guest to 1). This was deemed unacceptable by Linus:
https://lkml.org/lkml/2012/12/12/570
Between family in town and the fresh snow in Breckenridge there is no time left
to be working on the proper fix for this over the holidays. In the New Year I
have more pressing problems to resolve -- like some memory leaks in perf which
are proving to be elusive -- although the aforementioned snow is probably why
they are proving to be elusive. Either way I do not have any spare time to work
on this and from the time I have managed to spend on it the solution is more
difficult than just moving to a new exclude_guest flag (does not work) or
flipping the logic to include_guest (which is not as trivial as one would
think).
So, two options: silently force exclude_guest on as suggested by Gleb which
means no impact to older perf binaries or revert the original patch which
caused the breakage.
This patch does the latter -- reverts the original patch that introduced the
regression. The problem can be revisited in the future as time allows.
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Link: http://lkml.kernel.org/r/1356749767-17322-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
"Improve the stability of the linux kernel on the parisc architecture"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: sigaltstack doesn't round ss.ss_sp as required
parisc: improve ptrace support for gdb single-step
parisc: don't claim cpu irqs more than once
parisc: avoid undefined shift in cnv_float.h
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On 24-Nov-12, at 10:05 AM, John David Anglin wrote:
> In trying to build the debian libsigsegv2 package, I found that sigaltstack
> doesn't round ss.ss_sp. The tests intentionally pass an unaligned pointer.
> This results in the two stack overflow tests failing.
The attached patch fixes this issue.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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Various GCC tests use gdb to simulate a multithreaded application. Many of
these tests have been failing on parisc linux.
GCC does this by using gdb to single-step the application, then gdb is used to
call other test specific code. Where this fails is when the application is
stepped into the delay slot of a taken branch. This sets the PSW B bit. When
the test specific code is executed, this usually clears the PSW B bit.
Currently, gdb is not allowed to set the B bit. So, the code falls through what
should be a taken branch.
The attached patch adds the PSW B bit to the set of bits that gdb is allowed to
set. In order to set the B bit, the trace system call must return using an
interrupt restore. The patch also modifies this code to use the saved IAOQ
values when they are saved by a ptrace syscall or interruption.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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The CPU irqs (timer and IPI) are not shared and only need to be claimed once.
A mismatch error occurs if they are claimed more than once.
Signed-off-by: John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Signed-off-by: Helge Deller <deller@gmx.de>
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The attached change fixes a float conversion problem found running the
GCC testsuite with GCC configured with --with-arch=2.0.
The actual problem occurs for an exponent value of 63. This is the
maximum exponent value that can be passed. This causes a left shift by
32 in the else hunk of the macro. This causes undefined behavior and the
wrong value is returned for dresultB. The fix is the check "exponent <=
62". If the exponent is 63, dresultB is set to 0. The patch also
optimizes the operation a bit by copying "Sall(sgl_value) <<
SGL_EXP_LENGTH" to val, so that sgl_value is not modified.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse fixes from Miklos Szeredi:
"This contain a bugfix for CUSE and miscellaneous small fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: remove unused variable in fuse_try_move_page()
fuse: make fuse_file_fallocate() static
fuse: Move CUSE Kconfig entry from fs/Kconfig into fs/fuse/Kconfig
cuse: fix uninitialized variable warnings
cuse: do not register multiple devices with identical names
cuse: use mutex as registration lock instead of spinlocks
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The variables mapping,index are initialized but never used
otherwise, so remove the unused variables.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Fix the following sparse warning:
fs/fuse/file.c:2249:6: warning: symbol 'fuse_file_fallocate' was not declared. Should it be static?
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Given that CUSE depends on FUSE, it only makes sense to move its
Kconfig entry into the FUSE Kconfig file. Also, add a few grammatical
and semantic touchups.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Fix the following compiler warnings:
fs/fuse/cuse.c: In function 'cuse_process_init_reply':
fs/fuse/cuse.c:288:24: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/fuse/cuse.c:272:14: note: 'val' was declared here
fs/fuse/cuse.c:284:10: warning: 'key' may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/fuse/cuse.c:272:8: note: 'key' was declared here
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Sysfs doesn't allow two devices with the same name, but we register a
sysfs entry for each cuse device without checking for name collisions.
This extends the registration to first check whether the name was already
registered.
To avoid race-conditions between the name-check and linking the device, we
need to protect the whole registration with a mutex.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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We need to check for name-collisions during cuse-device registration. To
avoid race-conditions, this needs to be protected during the whole device
registration. Therefore, replace the spinlocks by mutexes first so we can
safely extend the locked regions to include more expensive or sleeping
code paths.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Here are some GPIO fixes I stacked up in my GPIO tree:
- Remove a bad #include from the Samsung driver
- Some Kconfig hazzle for the Samsungs
- Skip gpiolib registration on EXYNOS5440
- Don't free the MVEBU label"
* tag 'fixes-for-v3.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: mvebu: Don't free chip label memory
gpio: samsung: skip gpio lib registration for EXYNOS5440
gpio: samsung: silent build warning for EXYNOS5 SoCs
gpio: samsung: fix pinctrl condition for exynos and exynos5440
gpio: samsung: remove inclusion <mach/regs-clock.h>
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The gpio_chip.label field is a const char * and assigned the value of a
call to dev_name(). Memory obtained from dev_name() should not be freed
by drivers.
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Since exynos5440 can support pinctrl so skip the legacy
gpiolib registration. If not, happens following.
WARNING: at drivers/gpio/gpio-samsung.c:3102 samsung_gpiolib_init+0x68/0x8c()
Unknown SoC in gpio-samsung, no GPIOs added
Acked-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch fixes following warning:
drivers/gpio/gpio-samsung.c:450:32: warning: 'exynos_gpio_cfg' defined but not used [-Wunused-variable]
drivers/gpio/gpio-samsung.c:2450:33: warning: 'exynos5_gpios_1' defined but not used [-Wunused-variable]
drivers/gpio/gpio-samsung.c:2618:33: warning: 'exynos5_gpios_2' defined but not used [-Wunused-variable]
drivers/gpio/gpio-samsung.c:2679:33: warning: 'exynos5_gpios_3' defined but not used [-Wunused-variable]
drivers/gpio/gpio-samsung.c:2715:33: warning: 'exynos5_gpios_4' defined but not used [-Wunused-variable]
Because current gpio-samsung is valid only on EXYNOS5250.
Cc: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Since EXYNOS5440 can select PINCTRL_EXYNOS5440 without PINCTRL_SAMSUNG,
it should be fixed. In detail, PINCTRL_SAMSUNG is a kind of frame work
for supporting pinctrl on most Samsung SoCs including S3C, S5P as well
except EXYNOS5440 so PINCTRL_EXYNOS5440 has been implemented separated.
Cc: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The <mach/regs-clock.h> is not needed for gpio-samsung.
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs fixes from Jaegeuk Kim:
o Support swap file and link generic_file_remap_pages
o Enhance the bio streaming flow and free section control
o Major bug fix on recovery routine
o Minor bug/warning fixes and code cleanups
* tag 'f2fs-for-3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (22 commits)
f2fs: use _safe() version of list_for_each
f2fs: add comments of start_bidx_of_node
f2fs: avoid issuing small bios due to several dirty node pages
f2fs: support swapfile
f2fs: add remap_pages as generic_file_remap_pages
f2fs: add __init to functions in init_f2fs_fs
f2fs: fix the debugfs entry creation path
f2fs: add global mutex_lock to protect f2fs_stat_list
f2fs: remove the blk_plug usage in f2fs_write_data_pages
f2fs: avoid redundant time update for parent directory in f2fs_delete_entry
f2fs: remove redundant call to set_blocksize in f2fs_fill_super
f2fs: move f2fs_balance_fs to punch_hole
f2fs: add f2fs_balance_fs in several interfaces
f2fs: revisit the f2fs_gc flow
f2fs: check return value during recovery
f2fs: avoid null dereference in f2fs_acl_from_disk
f2fs: initialize newly allocated dnode structure
f2fs: update f2fs partition info about SIT/NAT layout
f2fs: update f2fs document to reflect SIT/NAT layout correctly
f2fs: remove unneeded INIT_LIST_HEAD at few places
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This is calling list_del() inside a loop which is a problem when we try
move to the next item on the list. I've converted it to use the _safe
version. And also, as a cleanup, I've converted it to use
list_for_each_entry instead of list_for_each.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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The caller of start_bidx_of_node() should give proper node offsets which
point only direct node blocks. Otherwise, it is a caller's bug.
This patch adds comments to make it clear.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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If some small bios of dirty node pages are supposed to be issued during the
sequential data writes, there-in well-produced consecutive data bios are able
to be split by the small node bios, resulting in performance degradation.
So, let's collect a number of dirty node pages until reaching a threshold.
And, by default, I set the threshold as 2MB, a segment size.
This improves sequential write performance on i5, 512GB SSD (830 w/ SATA2) as
follows.
Before: 231 MB/s -> After: 255 MB/s
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
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This patch adds f2fs_bmap operation to the data address space.
This enables f2fs to support swapfile.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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This was added for all the file systems before.
See the following commit.
commit id: 0b173bc4daa8f8ec03a85abf5e47b23502ff80af
[PATCH] mm: kill vma flag VM_CAN_NONLINEAR
This patch moves actual ptes filling for non-linear file mappings
into special vma operation: ->remap_pages().
File system must implement this method to get non-linear mappings support,
if it uses filemap_fault() then generic_file_remap_pages() can be used.
Now device drivers can implement this method and obtain nonlinear vma support."
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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Add __init to functions in init_f2fs_fs for code consistency.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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As the "status" debugfs entry will be maintained for entire F2FS filesystem
irrespective of the number of partitions.
So, we can move the initialization to the init part of the f2fs and destroy will
be done from exit part. After making changes, for individual partition mount -
entry creation code will not be executed.
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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There is an race condition between umounting f2fs and reading f2fs/status, which
results in oops.
Fox example:
Thread A Thread B
umount f2fs cat f2fs/status
f2fs_destroy_stats() { stat_show() {
list_for_each_entry_safe(&f2fs_stat_list)
list_del(&si->stat_list);
mutex_lock(&si->stat_lock);
si->sbi = NULL;
mutex_unlock(&si->stat_lock);
kfree(sbi->stat_info);
} mutex_lock(&si->stat_lock) <- si is gone.
...
}
Solution with a global lock: f2fs_stat_mutex:
Thread A Thread B
umount f2fs cat f2fs/status
f2fs_destroy_stats() { stat_show() {
mutex_lock(&f2fs_stat_mutex);
list_del(&si->stat_list);
mutex_unlock(&f2fs_stat_mutex);
kfree(sbi->stat_info); mutex_lock(&f2fs_stat_mutex);
} list_for_each_entry_safe(&f2fs_stat_list)
...
mutex_unlock(&f2fs_stat_mutex);
}
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
[jaegeuk.kim@samsung.com: fix typos, description, and remove the existing lock]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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Let's consider the usage of blk_plug in f2fs_write_data_pages().
We can come up with the two issues: lock contention and task awareness.
1. Merging bios prior to grabing "queue lock"
The f2fs merges consecutive IOs in the file system level before
submitting any bios, which is similar with the back merge by the
plugging mechanism in attempt_plug_merge(). Both of them need to acquire
no queue lock.
2. Merging policy with respect to tasks
The f2fs merges IOs as much as possible regardless of tasks, while
blk-plugging is conducted on a basis of tasks. As we can understand
there are trade-offs, f2fs tries to maximize the write performance with
well-merged bios.
As a result, if f2fs produces many consecutive but separated bios in
writepages(), it would be good to use blk-plugging since f2fs would be
able to avoid queue lock contention in the block layer by merging them.
But, f2fs merges IOs and submit one bio, which means that there are not
much chances to merge bios by attempt_plug_merge().
However, f2fs has already been used blk_plug by triggering generic_writepages()
in f2fs_write_data_pages().
So to make the overall code consistency, I'd like to remove blk_plug there.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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In call to f2fs_delete_entry, 'dir' time modification code is put
at two places.
So, remove the redundant code for timing update.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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Since, f2fs supports only 4KB blocksize, which is set at the beginning in
f2fs_fill_super. So, we do not need to again check this blocksize setting
in such case.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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The f2fs_fallocate() has two operations: punch_hole and expand_size.
Only in the case of punch_hole, dirty node pages can be produced, so let's
trigger f2fs_balance_fs() in this case only.
Furthermore, let's trigger it at every data truncation routine.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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The f2fs_balance_fs() is to check the number of free sections and decide whether
it needs to conduct cleaning or not. If there are not enough free sections, the
cleaning job should be started.
In order to control an amount of free sections even under high utilization, f2fs
should call f2fs_balance_fs at all the VFS interfaces that are able to produce
dirty pages.
This patch adds the function calls in the missing interfaces as follows.
1. f2fs_setxattr()
The f2fs_setxattr() produces dirty node pages so that we should call
f2fs_balance_fs() either likewise doing in other VFS interfaces such as
f2fs_lookup(), f2fs_mkdir(), and so on.
2. f2fs_sync_file()
We should guarantee serving free sections for syncing metadata during fsync.
Previously, there is no space check before triggering checkpoint and
sync_node_pages.
Therefore, if a bunch of fsync calls are triggered under 100% of FS utilization,
f2fs is able to be faced with no free sections, resulting in BUG_ON().
3. f2fs_sync_fs()
Before calling write_checkpoint(), we should guarantee that there are minimum
free sections.
4. f2fs_write_inode()
f2fs_write_inode() is also able to produce dirty node pages.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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I'd like to revisit the f2fs_gc flow and rewrite as follows.
1. In practical, the nGC parameter of f2fs_gc is meaningless. So, let's
remove it.
2. Background GC marks victim blocks as dirty one at a time.
3. Foreground GC should do cleaning job until acquiring enough free
sections. Afterwards, it needs to do checkpoint.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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This patch resolves Coverity #753102:
>>> No check of the return value of "f2fs_add_link(&dent, inode)".
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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This patch resolves Coverity #751303:
>>> CID 753103: Explicit null dereferenced (FORWARD_NULL) Passing null
>>> pointer "value" to function "f2fs_acl_from_disk(char const *, size_t)",
which dereferences it.
[Error path]
- value = NULL;
- retval = 0 by f2fs_getxattr();
- f2fs_acl_from_disk(value:NULL, ...);
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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This patch resolves Coverity #753112.
In practical, the existing code flow does not fall into the reported errorneous
path. But, anyway, let's avoid this for future.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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Update partition info output under debug FS to reflect segment layout correctly.
Signed-off-by: Huajun Li <huajun.li.lee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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document to reflect the layout generated by mkfs.f2fs .
Signed-off-by: Huajun Li <huajun.li.lee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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While creating a new entry for addition to the list(orphan inode list
and fsync inode entry list), there is no need to call HEAD initialization
for these entries. So, remove that init part.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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After doing a punch hole or expanding inode doing fallocation.
The change and modification time are not update for the file.
So, update time after no issue is observed in fallocate.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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Introduced f2fs_msg function to differentiate f2fs specific messages in
the log. And, added few informative prints in the mount path, to convey
proper error in case of mount failure.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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Pull vfio fix from Alex Williamson.
"vfio-pci: Fix buffer overfill"
* tag 'vfio-for-v3.8-rc5' of git://github.com/awilliam/linux-vfio:
vfio-pci: Fix buffer overfill
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A read from a range hidden from the user (ex. MSI-X vector table)
attempts to fill the user buffer up to the end of the excluded range
instead of up to the requested count. Fix it.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull ftrace fix from Steven Rostedt:
"Kprobes now uses the function tracer if it can. That is, if a probe
is placed on a function mcount/nop location, and the arch supports it,
instead of adding a breakpoint, kprobes will register a function
callback as that is much more efficient.
The function tracer requires to update modules before they run, and
uses the module notifier to do so. But if something else in the
module notifiers registers a kprobe at one of these locations, before
ftrace can get to it, then the system could fail.
The function tracer must be initialized early, otherwise module
notifiers that probe will only work by chance."
* tag 'trace-3.8-rc4-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace: Be first to run code modification on modules
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If some other kernel subsystem has a module notifier, and adds a kprobe
to a ftrace mcount point (now that kprobes work on ftrace points),
when the ftrace notifier runs it will fail and disable ftrace, as well
as kprobes that are attached to ftrace points.
Here's the error:
WARNING: at kernel/trace/ftrace.c:1618 ftrace_bug+0x239/0x280()
Hardware name: Bochs
Modules linked in: fat(+) stap_56d28a51b3fe546293ca0700b10bcb29__8059(F) nfsv4 auth_rpcgss nfs dns_resolver fscache xt_nat iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack lockd sunrpc ppdev parport_pc parport microcode virtio_net i2c_piix4 drm_kms_helper ttm drm i2c_core [last unloaded: bid_shared]
Pid: 8068, comm: modprobe Tainted: GF 3.7.0-0.rc8.git0.1.fc19.x86_64 #1
Call Trace:
[<ffffffff8105e70f>] warn_slowpath_common+0x7f/0xc0
[<ffffffff81134106>] ? __probe_kernel_read+0x46/0x70
[<ffffffffa0180000>] ? 0xffffffffa017ffff
[<ffffffffa0180000>] ? 0xffffffffa017ffff
[<ffffffff8105e76a>] warn_slowpath_null+0x1a/0x20
[<ffffffff810fd189>] ftrace_bug+0x239/0x280
[<ffffffff810fd626>] ftrace_process_locs+0x376/0x520
[<ffffffff810fefb7>] ftrace_module_notify+0x47/0x50
[<ffffffff8163912d>] notifier_call_chain+0x4d/0x70
[<ffffffff810882f8>] __blocking_notifier_call_chain+0x58/0x80
[<ffffffff81088336>] blocking_notifier_call_chain+0x16/0x20
[<ffffffff810c2a23>] sys_init_module+0x73/0x220
[<ffffffff8163d719>] system_call_fastpath+0x16/0x1b
---[ end trace 9ef46351e53bbf80 ]---
ftrace failed to modify [<ffffffffa0180000>] init_once+0x0/0x20 [fat]
actual: cc:bb:d2:4b:e1
A kprobe was added to the init_once() function in the fat module on load.
But this happened before ftrace could have touched the code. As ftrace
didn't run yet, the kprobe system had no idea it was a ftrace point and
simply added a breakpoint to the code (0xcc in the cc:bb:d2:4b:e1).
Then when ftrace went to modify the location from a call to mcount/fentry
into a nop, it didn't see a call op, but instead it saw the breakpoint op
and not knowing what to do with it, ftrace shut itself down.
The solution is to simply give the ftrace module notifier the max priority.
This should have been done regardless, as the core code ftrace modification
also happens very early on in boot up. This makes the module modification
closer to core modification.
Link: http://lkml.kernel.org/r/20130107140333.593683061@goodmis.org
Cc: stable@vger.kernel.org
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reported-by: Frank Ch. Eigler <fche@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
Pull libata fixes from Jeff Garzik:
1) ahci: Fix typo that caused erronenous error handling.
Thought: I wonder if sparse could have caught this, somehow.
2) ahci: support a slightly odd Enmotus variant
3) core: fix a drive detection problem by correcting the logic by which
the DevSlp timing variables are obtained and used.
* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] replace sata_settings with devslp_timing
[libata] ahci: Add support for Enmotus Bobcat device.
[libata] ahci: Fix lack of command retry after a success error handler.
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NCQ capability was used to check availability of SATA Settings page
from Identify Device Data Log, which contains DevSlp timing variables.
It does not work on some HDDs and leads to error messages.
IDENTIFY word 78 bit 5(Hardware Feature Control) can't work either
because it is only the sufficient condition of Identify Device data
log, not the necessary condition.
This patch replaced ata_device->sata_settings with ->devslp_timing
to only save DevSlp timing variables(8 bytes), instead of the whole
SATA Settings page(512 bytes).
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=51881
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Shane Huang <shane.huang@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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