Re: [GIT PULL] Core block bits for 2.6.40

[Eric Dumazet <eric.dumazet@gmail.com>]

Le mercredi 25 mai 2011 à 15:03 +0200, Jens Axboe a écrit :
> Hi Linus,
> 
> A real pull request this time. These are the core bits for the next
> kernel. Nothing exciting in here in this round, with the churn in
> the last release, this release will be mellow.
> 
> - Optimizations for queue flushing on SATA devices, where we
>   can't queue a FLUSH command. This fixes up a performance regression
>   caused by a bug fix to prevent potential live lock on adding
>   FLUSH commands at the head of the queue.
> 
> - Make stats lockless for blk-cgroup.
> 
> - Various bug fixes for blk-cgroup.
> 
> - Various little fixes and improvements to CFQ.
> 
> - Last round of media event changes.
> 
> - Fixes for discard topology reporting and sysfs documentation update
>   for the same.
> 
> - Add support for batched discards. This greatly speeds up discarding
>   an entire device.
> 
> - Fix for bad return value in the discard ioctl.
> 
> - Remove request plug state debug checks. Haven't triggered even during
>   the 2.6.39-rc devel cycle, so get rid of them.
> 
> 
> Please pull!
> 
> 
>   git://git.kernel.dk/linux-2.6-block.git for-2.6.40/core
> 

> Tao Ma (2):
>       block: Remove 'plug/unplug' comment in blk_execute_rq_nowait
>       block: Remove extra discard_alignment from hd_struct.

At boot, I have a crash in part_discard_alignment_show+0x1b/0x50

CR2 : 000006ac

fault in : mov    0x2c(%rcx),%edx

I suspect commit 23ceb5b7719e9276d4 (block: Remove extra
discard_alignment from hd_struct) being in fault