linux-kernel - RE: [PATCH 2/2] aio: propogate post-EIOCBQUEUED errors to completion event

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Date:	Wed, 21 Feb 2007 11:44:04 +0300
From:	"Ananiev, Leonid I" <leonid.i.ananiev@...el.com>
To:	"Ken Chen" <kenchen@...gle.com>
Cc:	"Chris Mason" <chris.mason@...cle.com>,
	"Zach Brown" <zach.brown@...cle.com>, <linux-aio@...ck.org>,
	<linux-kernel@...r.kernel.org>,
	"Benjamin LaHaise" <bcrl@...ck.org>,
	"Suparna bhattacharya" <suparna@...ibm.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: RE: [PATCH 2/2] aio: propogate post-EIOCBQUEUED errors to completion event

> where it returns zero 
I've wrote in the mail http://lkml.org/lkml/2007/2/8/337
invalidate_inode_pages2_range() reports BUG:
warning at mm/truncate.c:398  occurs becouse of
invalidate_complete_page2()    returns 0; it returns 0 because of
try_to_release_page()          returns 0; it returns 0 because of
ext3_releasepage()             returns 0; it returns 0 because of
journal_try_to_free_buffers()  returns 0; it returns 0 because of
try_to_free_buffers()          returns 0; it returns 0 because of
drop_buffers()                 returns 0; it returns 0 because of
buffer_busy(bh)                returns 1; it returns 0 because of
buffer_head count is 1 (bh->b_count==1) as additional printk reports.

Leonid
-----Original Message-----
From: Ken Chen [mailto:kenchen@...gle.com] 
Sent: Wednesday, February 21, 2007 11:36 AM
To: Ananiev, Leonid I
Cc: Chris Mason; Zach Brown; linux-aio@...ck.org;
linux-kernel@...r.kernel.org; Benjamin LaHaise; Suparna bhattacharya;
Andrew Morton
Subject: Re: [PATCH 2/2] aio: propogate post-EIOCBQUEUED errors to
completion event

On 2/20/07, Ananiev, Leonid <leonid.i.ananiev@...el.com> wrote:
> 1) mem=1G in kernel boot param if you have more
> 2) unmount; mk2fs; mount
> 3) dd if=/dev/zero of=<test_file> bs=1M count=1200
> 4) aiostress -s 1200m -O -o 2 -i 1 -r 16k <test_file>
> 5) if i++<50 goto 2).

Would you please instrument the call chain of
invalidate_complete_page2() and tell us exactly where it returns zero
value in your failure case?

   invalidate_complete_page2
      try_to_release_page
         ext3_releasepage
            journal_try_to_free_buffers
               ???
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