Re: [PATCH 4/6] writeback: fix writeback_inodes_wb from writeback_inodes_sb

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On 2010-06-09 14:25, Christoph Hellwig wrote:
> On Tue, Jun 08, 2010 at 09:51:39PM +0200, Jens Axboe wrote:
>> On 08/06/10 18.14, Christoph Hellwig wrote:
>>> When we call writeback_inodes_wb from writeback_inodes_sb we always have
>>> s_umount held, which currently makes the whole operation a no-op.
>>>
>>> But if we are called to write out inodes for a specific superblock we always
>>> have s_umount held, so replace the incorrect logic checking for WB_SYNC_ALL
>>> which only worked by coincidence with the proper check for an explicit
>>> superblock argument.
>>
>> This is tons better than the pinning, I like it a lot.
> 
> Unfortunately I accidentally removed the requeue_io call when we fail
> to pin the inode.  This leads to softlockups after heavy I/O load.
> 
> Please fold the patch below into this one, or if not possible add it
> to the end of the series.

Oops, not good. I already merged and pushed them out, so I added it to
the end instead.

-- 
Jens Axboe

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