linux-kernel - Re: pdflush stuck in D state with v2.6.24-rc1-192-gef49c32

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Date:	Fri, 2 Nov 2007 09:33:21 +0800
From:	Fengguang Wu <wfg@...l.ustc.edu.cn>
To:	Florin Iucha <florin@...ha.net>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: pdflush stuck in D state with v2.6.24-rc1-192-gef49c32

On Thu, Nov 01, 2007 at 09:14:14AM -0500, Florin Iucha wrote:
> On Thu, Nov 01, 2007 at 09:03:33PM +0800, Fengguang Wu wrote:
> > Or will the system or fs size/age make any difference? If you happen
> > to have a spare/swap partition, could you make a new reiserfs and
> > mount it and copy several less-than-4KB files into it and wait for 30s
> > and see what happen to pdflush?
> 
> I will try that with a USB disk - I hope that won't make a difference.

Thank you. I guess a reiserfs on loop file would also be OK.

> > btw, what's the exact kernel version you are running?
> 
> I noticed it with the kernel in the $SUBJECT, as reported by 'git
> describe'.  I have pulled in new changesets since then.

And with the following patch applied?

---
 fs/reiserfs/stree.c |    3 ---
 1 file changed, 3 deletions(-)

--- linux-2.6.24-git17.orig/fs/reiserfs/stree.c
+++ linux-2.6.24-git17/fs/reiserfs/stree.c
@@ -1458,9 +1458,6 @@ static void unmap_buffers(struct page *p
 				}
 				bh = next;
 			} while (bh != head);
-			if (PAGE_SIZE == bh->b_size) {
-				cancel_dirty_page(page, PAGE_CACHE_SIZE);
-			}
 		}
 	}
 }

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