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* amd64_edac: add ECC reporting initializersDoug Thompson2009-06-10
| | | | | | | | | | | | | | | Borislav: - convert to the new {rd|wr}msr_on_cpus interfaces. - convert pvt->old_mcgctl to a bitmask thus saving some bytes - fix/cleanup comments - fix function return value patterns - add a proper bugfix found by Doug to amd64_check_ecc_enabled where we missed checking for the ECC enabled bit in NB CFG. - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add EDAC core-related initializersDoug Thompson2009-06-10
| | | | | | | | | | | | | | Borislav: - add a amd64_free_mc_sibling_devices() helper instead of opencoding the release-path. - fix/cleanup comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add error decoding logicDoug Thompson2009-06-10
| | | | | | | | | | | | | Borislav: - fold amd64_error_info_valid() into its only user - fix/cleanup comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add ECC chipkill syndrome mapping tableDoug Thompson2009-06-10
| | | | | | | | | | | Borislav: - fix comments - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add per-family descriptorsDoug Thompson2009-06-10
| | | | | | | | | | | Borislav: - fix comments - fix function return value patterns Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add F10h-and-later methods-p3Doug Thompson2009-06-10
| | | | | | | | | | | | | | | | Borislav: - compute dct_sel_base_off in f10_match_to_this_node() correctly since it cannot be assumed that the Reserved bits are zero and they have to be masked out instead. - cleanup, remove StinkyIdentifiers, simplify logic - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add F10h-and-later methods-p2Doug Thompson2009-06-10
| | | | | | | | | | | | | | | Borislav: - fix a wrong negation in f10_determine_base_addr_offset() - fix a wrong mask in f10_determine_base_addr_offset() which should select DctSelBaseAddr[31:11] and not [31:16] as it was before - remove StinkyIdentifiers, trivially simplify code. - fix/cleanup comments - fix function return value patterns Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add F10h-and-later methods-p1Doug Thompson2009-06-10
| | | | | | | | | | | | | | | Borislav: Fail f10_early_channel_count() if error encountered while reading a NB register since those cached register contents are accessed afterwards. - fix/cleanup comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add k8-specific methodsDoug Thompson2009-06-10
| | | | | | | | | | | | Borislav: - fix/cleanup/move comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: assign DRAM chip select base and mask in a family-specific wayDoug Thompson2009-06-10
| | | | | | | | | | | | Borislav: - cleanup/fix comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add helper to dump relevant registersDoug Thompson2009-06-10
| | | | | | | | | | | | Borislav: - cleanup/fix comments - fix function return value patterns - cleanup dbg calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add DRAM address type conversion facilitiesDoug Thompson2009-06-10
| | | | | | | | | | | | Borislav: - cleanup/fix comments, add BKDG refs - fix function return value patterns - cleanup dbg calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add functionality to compute the DRAM holeDoug Thompson2009-06-10
| | | | | | | | | | | Borislav: - cleanup/fix comments, add BKDG refs - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add sys addr to memory controller mapping helpersDoug Thompson2009-06-10
| | | | | | | | | | | | Borislav: - cleanup comments - cleanup debug calls - simplify find_mc_by_sys_addr's exit path Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add memory scrubber interfaceDoug Thompson2009-06-10
| | | | | | | | | | | Borislav: - fix/cleanup comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add MCA error typesDoug Thompson2009-06-10
| | | | | | | | | Borislav: - cleanup comments Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add DRAM error injection logic using sysfsDoug Thompson2009-06-10
| | | | | | | | | | | | Borislav: - rename sysfs attrs to more conform names - cleanup/fix comments according to BKDG text - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add debugging/testing codeDoug Thompson2009-06-10
| | | | | | | | | | | | | | | | | This is for dumping different registers and testing the address mapping logic using the ECC syndromes. Borislav: - split sysfs attrs per file - use more conform names for the sysfs attrs - fix function return value patterns - cleanup/fix comments - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* amd64_edac: add driver headerDoug Thompson2009-06-10
| | | | | | | | | | Borislav: - remove register bit descriptions (complete text in BKDG) - cleanup and remove excessive/superfluous comments Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* edac: fold __func__ into edac_debug_printkBorislav Petkov2009-06-10
| | | | | | | | This shortens debugfX() calls a bit. Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com> CC: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* x86: MSR: add methods for writing of an MSR on several CPUsBorislav Petkov2009-06-10
| | | | | | | | | | | | Provide for concurrent MSR writes on all the CPUs in the cpumask. Also, add a temporary workaround for smp_call_function_many which skips the CPU we're executing on. Bart: zero out rv struct which is allocated on stack. CC: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* x86: MSR: add a struct representation of an MSRBorislav Petkov2009-06-10
| | | | | | | | | | | | Add a struct representing a 64bit MSR pair consisting of a low and high register part and convert msr_info to use it. Also, rename msr-on-cpu.c to msr.c. Side note: Put the cpumask.h include in __KERNEL__ space thus fixing an allmodconfig build failure in the headers_check target. CC: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* Linux 2.6.30Linus Torvalds2009-06-09
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* char: mxser, fix ISA board lookupPeter Botha2009-06-09
| | | | | | | | | | | | | | | | | There's a bug in the mxser kernel module that still appears in the 2.6.29.4 kernel. mxser_get_ISA_conf takes a ioaddress as its first argument, by passing the not of the ioaddr, you're effectively passing 0 which means it won't be able to talk to an ISA card. I have tested this, and removing the ! fixes the problem. Cc: "Peter Botha" <peterb@goldcircle.co.za> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* jbd: fix race in buffer processing in commit codeJan Kara2009-06-09
| | | | | | | | | | | | | | | | | | | In commit code, we scan buffers attached to a transaction. During this scan, we sometimes have to drop j_list_lock and then we recheck whether the journal buffer head didn't get freed by journal_try_to_free_buffers(). But checking for buffer_jbd(bh) isn't enough because a new journal head could get attached to our buffer head. So add a check whether the journal head remained the same and whether it's still at the same transaction and list. This is a nasty bug and can cause problems like memory corruption (use after free) or trigger various assertions in JBD code (observed). Signed-off-by: Jan Kara <jack@suse.cz> Cc: <stable@kernel.org> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs4: remove hashed check in validate_wait()Ian Kent2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent ->lookup() deadlock correction required the directory inode mutex to be dropped while waiting for expire completion. We were concerned about side effects from this change and one has been identified. I saw several error messages. They cause autofs to become quite confused and don't really point to the actual problem. Things like: handle_packet_missing_direct:1376: can't find map entry for (43,1827932) which is usually totally fatal (although in this case it wouldn't be except that I treat is as such because it normally is). do_mount_direct: direct trigger not valid or already mounted /test/nested/g3c/s1/ss1 which is recoverable, however if this problem is at play it can cause autofs to become quite confused as to the dependencies in the mount tree because mount triggers end up mounted multiple times. It's hard to accurately check for this over mounting case and automount shouldn't need to if the kernel module is doing its job. There was one other message, similar in consequence of this last one but I can't locate a log example just now. When checking if a mount has already completed prior to adding a new mount request to the wait queue we check if the dentry is hashed and, if so, if it is a mount point. But, if a mount successfully completed while we slept on the wait queue mutex the dentry must exist for the mount to have completed so the test is not really needed. Mounts can also be done on top of a global root dentry, so for the above case, where a mount request completes and the wait queue entry has already been removed, the hashed test returning false can cause an incorrect callback to the daemon. Also, d_mountpoint() is not sufficient to check if a mount has completed for the multi-mount case when we don't have a real mount at the base of the tree. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* shm: fix unused warnings on nommuMike Frysinger2009-06-09
| | | | | | | | | | | | The massive nommu update (8feae131) resulted in these warnings: ipc/shm.c: In function `sys_shmdt': ipc/shm.c:974: warning: unused variable `size' ipc/shm.c:972: warning: unused variable `next' Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds2009-06-09
|\ | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: kvm: fix kvm reboot crash when MAXSMP is used cpumask: alloc zeroed cpumask for static cpumask_var_ts cpumask: introduce zalloc_cpumask_var
| * kvm: fix kvm reboot crash when MAXSMP is usedAvi Kivity2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | one system was found there is crash during reboot then kvm/MAXSMP Sending all processes the KILL signal... done Please stand by while rebooting the system... [ 1721.856538] md: stopping all md devices. [ 1722.852139] kvm: exiting hardware virtualization [ 1722.854601] BUG: unable to handle kernel NULL pointer dereference at (null) [ 1722.872219] IP: [<ffffffff8102c6b6>] hardware_disable+0x4c/0xb4 [ 1722.877955] PGD 0 [ 1722.880042] Oops: 0000 [#1] SMP [ 1722.892548] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/host0/target0:2:0/0:2:0:0/vendor [ 1722.900977] CPU 9 [ 1722.912606] Modules linked in: [ 1722.914226] Pid: 0, comm: swapper Not tainted 2.6.30-rc7-tip-01843-g2305324-dirty #299 ... [ 1722.932589] RIP: 0010:[<ffffffff8102c6b6>] [<ffffffff8102c6b6>] hardware_disable+0x4c/0xb4 [ 1722.942709] RSP: 0018:ffffc900010b6ed8 EFLAGS: 00010046 [ 1722.956121] RAX: 0000000000000000 RBX: ffffc9000e253140 RCX: 0000000000000009 [ 1722.972202] RDX: 000000000000b020 RSI: ffffc900010c3220 RDI: ffffffffffffd790 [ 1722.977399] RBP: ffffc900010b6f08 R08: 0000000000000000 R09: 0000000000000000 [ 1722.995149] R10: 00000000000004b8 R11: 966912b6c78fddbd R12: 0000000000000009 [ 1723.011551] R13: 000000000000b020 R14: 0000000000000009 R15: 0000000000000000 [ 1723.019898] FS: 0000000000000000(0000) GS:ffffc900010b3000(0000) knlGS:0000000000000000 [ 1723.034389] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 1723.041164] CR2: 0000000000000000 CR3: 0000000001001000 CR4: 00000000000006e0 [ 1723.056192] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1723.072546] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 1723.080562] Process swapper (pid: 0, threadinfo ffff88107e464000, task ffff88047e5a2550) [ 1723.096144] Stack: [ 1723.099071] 0000000000000046 ffffc9000e253168 966912b6c78fddbd ffffc9000e253140 [ 1723.115471] ffff880c7d4304d0 ffffc9000e253168 ffffc900010b6f28 ffffffff81011022 [ 1723.132428] ffffc900010b6f48 966912b6c78fddbd ffffc900010b6f48 ffffffff8100b83b [ 1723.141973] Call Trace: [ 1723.142981] <IRQ> <0> [<ffffffff81011022>] kvm_arch_hardware_disable+0x26/0x3c [ 1723.158153] [<ffffffff8100b83b>] hardware_disable+0x3f/0x55 [ 1723.172168] [<ffffffff810b95f6>] generic_smp_call_function_interrupt+0x76/0x13c [ 1723.178836] [<ffffffff8104cbea>] smp_call_function_interrupt+0x3a/0x5e [ 1723.194689] [<ffffffff81035bf3>] call_function_interrupt+0x13/0x20 [ 1723.199750] <EOI> <0> [<ffffffff814ad3b4>] ? acpi_idle_enter_c1+0xd3/0xf4 [ 1723.217508] [<ffffffff814ad3ae>] ? acpi_idle_enter_c1+0xcd/0xf4 [ 1723.232172] [<ffffffff814ad4bc>] ? acpi_idle_enter_bm+0xe7/0x2ce [ 1723.235141] [<ffffffff81a8d93f>] ? __atomic_notifier_call_chain+0x0/0xac [ 1723.253381] [<ffffffff818c3dff>] ? menu_select+0x58/0xd2 [ 1723.258179] [<ffffffff818c2c9d>] ? cpuidle_idle_call+0xa4/0xf3 [ 1723.272828] [<ffffffff81034085>] ? cpu_idle+0xb8/0x101 [ 1723.277085] [<ffffffff81a80163>] ? start_secondary+0x1bc/0x1d7 [ 1723.293708] Code: b0 00 00 65 48 8b 04 25 28 00 00 00 48 89 45 e0 31 c0 48 8b 04 cd 30 ee 27 82 49 89 cc 49 89 d5 48 8b 04 10 48 8d b8 90 d7 ff ff <48> 8b 87 70 28 00 00 48 8d 98 90 d7 ff ff eb 16 e8 e9 fe ff ff [ 1723.335524] RIP [<ffffffff8102c6b6>] hardware_disable+0x4c/0xb4 [ 1723.342076] RSP <ffffc900010b6ed8> [ 1723.352021] CR2: 0000000000000000 [ 1723.354348] ---[ end trace e2aec53dae150aa1 ]--- it turns out that we need clear cpus_hardware_enabled in that case. Reported-and-tested-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * cpumask: alloc zeroed cpumask for static cpumask_var_tsYinghai Lu2009-06-09
| | | | | | | | | | | | | | | | These are defined as static cpumask_var_t so if MAXSMP is not used, they are cleared already. Avoid surprises when MAXSMP is enabled. Signed-off-by: Yinghai Lu <yinghai.lu@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * cpumask: introduce zalloc_cpumask_varYinghai Lu2009-06-09
| | | | | | | | | | | | | | So can get cpumask_var with cpumask_clear Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2009-06-09
|\ \ | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: bsg: setting rq->bio to NULL
| * | bsg: setting rq->bio to NULLFUJITA Tomonori2009-06-09
| |/ | | | | | | | | | | | | | | | | | | | | | | | | Due to commit 1cd96c242a829d52f7a5ae98f554ca9775429685 ("block: WARN in __blk_put_request() for potential bio leak"), BSG SMP requests get the false warnings: WARNING: at block/blk-core.c:1068 __blk_put_request+0x52/0xc0() This sets rq->bio to NULL to avoid that false warnings. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2009-06-09
|\ \ | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: cls_cgroup: Fix oops when user send improperly 'tc filter add' request r8169: fix crash when large packets are received
| * | cls_cgroup: Fix oops when user send improperly 'tc filter add' requestMinoru Usui2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I found a bug in cls_cgroup_change() in cls_cgroup.c. cls_cgroup_change() expected tca[TCA_OPTIONS] was set from user space properly, but tc in iproute2-2.6.29-1 (which I used) didn't set it. In the current source code of tc in git, it set tca[TCA_OPTIONS]. git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git If we always use a newest iproute2 in git when we use cls_cgroup, we don't face this oops probably. But I think, kernel shouldn't panic regardless of use program's behaviour. Signed-off-by: Minoru Usui <usui@mxm.nes.nec.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | r8169: fix crash when large packets are receivedEric Dumazet2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Michael Tokarev reported receiving a large packet could crash a machine with RTL8169 NIC. ( original thread at http://lkml.org/lkml/2009/6/8/192 ) Problem is this driver tells that NIC frames up to 16383 bytes can be received but provides skb to rx ring allocated with smaller sizes (1536 bytes in case standard 1500 bytes MTU is used) When a frame larger than what was allocated by driver is received, dma transfert can occurs past the end of buffer and corrupt kernel memory. Fix is to tell to NIC what is the maximum size a frame can be. This bug is very old, (before git introduction, linux-2.6.10), and should be backported to stable versions. Reported-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge branch 'for-linus' of git://neil.brown.name/mdLinus Torvalds2009-06-09
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | * 'for-linus' of git://neil.brown.name/md: md/raid5: fix bug in reshape code when chunk_size decreases. md/raid5 - avoid deadlocks in get_active_stripe during reshape md/raid5: use conf->raid_disks in preference to mddev->raid_disk
| * | md/raid5: fix bug in reshape code when chunk_size decreases.NeilBrown2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we support changing the chunksize, we calculate "reshape_sectors" to be the max of number of sectors in old and new chunk size. However there is one please where we still use 'chunksize' rather than 'reshape_sectors'. This causes a reshape that reduces the size of chunks to freeze. Signed-off-by: NeilBrown <neilb@suse.de>
| * | md/raid5 - avoid deadlocks in get_active_stripe during reshapeNeilBrown2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | md has functionality to 'quiesce' and array so that all pending IO completed and no new IO starts. This is used to achieve a stable state before making internal changes. Currently this quiescing applies equally to normal IO, resync IO, and reshape IO. However there is a problem with applying it to reshape IO. Reshape can have multiple 'stripe_heads' that must be active together. If the quiesce come between allocating the first and the last of such a collection, then we deadlock, as the last will not be allocated until the quiesce is lifted, the quiesce will not be lifted until the first (which has been allocated) gets used, and that first cannot be used until the last is allocated. It is not necessary to inhibit reshape IO when a quiesce is requested. Those places in the code that require a full quiesce will ensure the reshape thread is not running at all. So allow reshape requests to get access to new stripe_heads without being blocked by a 'quiesce'. This only affects in-place reshapes (i.e. where the array does not grow or shrink) and these are only newly supported. So this patch is not needed in earlier kernels. Signed-off-by: NeilBrown <neilb@suse.de>
| * | md/raid5: use conf->raid_disks in preference to mddev->raid_diskNeilBrown2009-06-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mddev->raid_disks can be changed and any time by a request from user-space. It is a suggestion as to what number of raid_disks is desired. conf->raid_disks can only be changed by the raid5 module with suitable locks in place. It is a statement as to the current number of raid_disks. There are two places where the latter should be used, but the former is used. This can lead to a crash when reshaping an array. This patch changes to mddev-> to conf-> Signed-off-by: NeilBrown <neilb@suse.de>
* | | async: Fix lack of boot-time console due to insufficient synchronizationLinus Torvalds2009-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Our async work synchronization was broken by "async: make sure independent async domains can't accidentally entangle" (commit d5a877e8dd409d8c702986d06485c374b705d340), because it would report the wrong lowest active async ID when there was both running and pending async work. This caused things like no being able to read the root filesystem, resulting in missing console devices and inability to run 'init', causing a boot-time panic. This fixes it by properly returning the lowest pending async ID: if there is any running async work, that will have a lower ID than any pending work, and we should _not_ look at the pending work list. There were alternative patches from Jaswinder and James, but this one also cleans up the code by removing the pointless 'ret' variable and the unnecesary testing for an empty list around 'for_each_entry()' (if the list is empty, the for_each_entry() thing just won't execute). Fixes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=13474 Reported-and-tested-by: Chris Clayton <chris2553@googlemail.com> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2009-06-08
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: Outline udelay and fix a few issues. MIPS: ioctl.h: Fix headers_check warnings MIPS: Cobalt: PCI bus is always required to obtain the board ID MIPS: Kconfig: Remove "Support for" from Cavium system type MIPS: Sibyte: Honor CONFIG_CMDLINE SSB: BCM47xx: Export ssb_watchdog_timer_set
| * | | MIPS: Outline udelay and fix a few issues.Ralf Baechle2009-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Outlining fixes the issue were on certain CPUs such as the R10000 family the delay loop would need an extra cycle if it overlaps a cacheline boundary. The rewrite also fixes build errors with GCC 4.4 which was changed in way incompatible with the kernel's inline assembly. Relying on pure C for computation of the delay value removes the need for explicit. The price we pay is a slight slowdown of the computation - to be fixed on another day. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | MIPS: ioctl.h: Fix headers_check warningsJaswinder Singh Rajput2009-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make ioctl.h compatible with asm-generic/ioctl.h and userspace fix the following 'make headers_check' warning: usr/include/asm-mips/ioctl.h:64: extern's make no sense in userspace Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | MIPS: Cobalt: PCI bus is always required to obtain the board IDYoichi Yuasa2009-06-08
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | MIPS: Kconfig: Remove "Support for" from Cavium system typeYoichi Yuasa2009-06-08
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Acked-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | MIPS: Sibyte: Honor CONFIG_CMDLINERalf Baechle2009-06-08
| | | | | | | | | | | | | | | | | | | | | | | | Original patch by Imre Kaloz <kaloz@openwrt.org>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | SSB: BCM47xx: Export ssb_watchdog_timer_setMatthieu Castet2009-06-08
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | this patch export ssb_watchdog_timer_set to allow to use it in a Linux watchdog driver. Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr> Acked-by : Michael Buesch <mb@bu3sch.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | pata_netcell: Fix typoAlan Cox2009-06-08
| | | | | | | | | | | | | | | | | | | | | | | | The previous patch submission had a I typo I didn't catch but Bartlomiej noted. Guess this proves the point about any patch being risky late in an rc Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2009-06-08
|\ \ \ | | | | | | | | | | | | | | | | * 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: Explicity initialize cpus_hardware_enabled
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