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SubjectRe: [GIT PULL] Core block bits for 2.6.40
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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



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