litmus2008.git/block, branch master

blktrace: kill the unneeded initcall

2008-01-11T12:37:01+00:00

It just inits the mutex, we can do that with DEFINE_MUTEX() instead.

Signed-off-by: Jens Axboe

block: fix blktrace timestamps

2008-01-11T12:35:54+00:00

David Dillow reported broken blktrace timestamps. The reason
is cpu_clock() which is not a global time source.

Fix bkltrace timestamps by using ktime_get() like the networking
code does for packet timestamps. This also removes a whole lot
of complexity from bkltrace.c and shrinks the code by 500 bytes:

   text    data     bss     dec     hex filename
   2888     124      44    3056     bf0 blktrace.o.before
   2390     116      44    2550     9f6 blktrace.o.after

Signed-off-by: Ingo Molnar 
Signed-off-by: Jens Axboe

block: let elv_register() return void

2007-12-18T07:29:28+00:00

elv_register() always returns 0, and there isn't anything it does where
it should return an error (the only error condition is so grave that
it's handled with a BUG_ON).

Signed-off-by: Adrian Bunk 
Signed-off-by: Jens Axboe

as-iosched: fix write batch start point

2007-12-18T07:29:28+00:00

New write batches currently start from where the last one completed.
We have no idea where the head is after switching batches, so this
makes little sense.  Instead, start the next batch from the request
with the earliest deadline in the hope that we avoid a deadline
expiry later on.

Signed-off-by: Aaron Carroll 
Acked-by: Nick Piggin 
Signed-off-by: Jens Axboe

as-iosched: fix incorrect comments

2007-12-18T07:29:28+00:00

Two comments refer to deadlines applying to reads only.  This is
not the case.

Signed-off-by: Aaron Carroll 
Acked-by: Nick Piggin 
Signed-off-by: Jens Axboe

block: use jiffies conversion functions in scsi_ioctl.c

2007-12-18T07:29:28+00:00

Use msecs_to_jiffies() and jiffies_to_msecs() in scsi_ioctl().
Sometimes callers use very large values for e.g. vendor specific media
clear command and calculation can overflow.

Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe

Revert "ll_rw_blk: temporarily enable max_segments tweaking"

2007-11-27T08:23:51+00:00

This was a temporary debugging thing for sg chaining testing, revert
it now as it has served its purpose.

This reverts commit 563063a808de6b2004d5b8a09ddcb6125481f4b2.

Signed-off-by: Jens Axboe

block: Fix memory leak in alloc_disk_node()

2007-11-27T08:19:40+00:00

Fix a memory leak in alloc_disk_node(). Don't forget to free 'dkstats' when the allocation of 'part' failed.

Signed-off-by: Jerome Marchand 
Signed-off-by: Jens Axboe

blktrace: Make sure BLKTRACETEARDOWN does the full cleanup.

2007-11-27T08:19:39+00:00

if blktrace program segfault it will not be able
to call BLKTRACETEARDOWN. Now if we run the blktrace
again that would result in a failure to create the
block/ debugfs directory.This will result
in blk_remove_root() to be called which will set
blk_tree_root to NULL. But the  debugfs block dir
still exist because it contain subdirectory.

Now if we try to fix it using BLKTRACETEARDOWN
it won't work because blk_tree_root is NULL.

Fix the same.

Tested as below

root@qemu-image:/home/kvaneesh/blktrace# ./blktrace  -d /dev/hdc
Segmentation fault
root@qemu-image:/home/kvaneesh/blktrace# ./blktrace  -d /dev/hdc
BLKTRACESETUP: No such file or directory
Failed to start trace on /dev/hdc
root@qemu-image:/home/kvaneesh/blktrace# ./blktrace  -k /dev/hdc
root@qemu-image:/home/kvaneesh/blktrace# ./blktrace  -d /dev/hdc

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Jens Axboe

Add UNPLUG traces to all appropriate places

2007-11-09T12:41:32+00:00

Added blk_unplug interface, allowing all invocations of unplugs to result
in a generated blktrace UNPLUG.

Signed-off-by: Alan D. Brunelle 
Signed-off-by: Jens Axboe