linux-kernel - Re: [GIT PULL] block/io bits for 2.6.35-rc

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Date:	Mon, 28 Jun 2010 10:05:18 -0400
From:	Brian Bloniarz <bmb@...enacr.com>
To:	Mark Lord <kernel@...savvy.com>
CC:	Jens Axboe <jaxboe@...ionio.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>
Subject: Re: [GIT PULL] block/io bits for 2.6.35-rc

On 06/28/2010 09:51 AM, Mark Lord wrote:
> On 28/06/10 03:03 AM, Jens Axboe wrote:
>> On 2010-06-28 01:10, Mark Lord wrote:
>>> On 10/06/10 12:44 PM, Brian Bloniarz wrote:
> ..
>>>> https://bugzilla.kernel.org/show_bug.cgi?id=15906 has links to the
>>>> downstream bugs.
>>> ..
>>>
>>> Jens, this bug has been biting my servers badly here for the past
>>> few months -- umount after a backup (from ext4 to ext4) takes 3-4
>>> minutes
>>> instead of the expected 3-4 seconds.
>>>
>>> Is there a patch file for this against 2.6.34 that I (and others)
>>> could use?
>>
>> It's the patch series from Christoph in my for-linus branch, I intend
>> to push it upstream when Linus is back and taking patches.
> ..
> 
> Still looking for a *patch* to fix  this here.
> 
> I found these two:
> 
> http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=e913fc825dc685a444cb4c1d0f9d32f372f5986
> 
> http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=30fd1e551a730d942e91109762c942786be0ef7c
> 
> 
> But they don't apply cleanly to 2.6.34.
> 
> Anyone?

Don't use those, they have bugs and have since been reverted.

Links to the patch series that Jens mentions are below. I doubt they
apply cleanly to older kernels. Somebody's probably going to need to
take a crack at backporting them eventually (I could try, even), but
I don't know anybody has yet.

Christoph Hellwig (8):
      writeback: fix writeback completion notifications
      writeback: queue work on stack in writeback_inodes_sb
      writeback: enforce s_umount locking in writeback_inodes_sb
      writeback: fix writeback_inodes_wb from writeback_inodes_sb
      writeback: simplify wakeup_flusher_threads
      writeback: simplify and split bdi_start_writeback
      writeback: add missing requeue_io in writeback_inodes_wb
      writeback: fix pin_sb_for_writeback

http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=2c99721ec6a55b2c1e7ba94945bbdae454e11308
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=ebf51611db2cfa33d056b4428f13275f81732fd5
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=de3f848fbc24f71174f3bcc7513b5a3fafb37bac
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=e15e123275b3ca3eeb378136046ab78eab214169
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=dcac2e708d8f8af1a220dd238027af5b4aedfc12
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=8163b53a6bfbfa14ae83f8cdbf536f9c191d3279
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=22e53a2ca88690c711a954d3c652b468a5e94272
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commitdiff;h=7eed7cc254e71352e5e2e642c70a9b04cd28cc76
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