From: Miklos Szeredi <miklos@szeredi.hu>
To: jbacik@redhat.com
Cc: miklos@szeredi.hu, trond.myklebust@fys.uio.no, npiggin@suse.de,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: NFS infinite loop in filemap_fault()
Date: Thu, 08 May 2008 20:42:03 +0200 [thread overview]
Message-ID: <E1JuB47-0008C9-5n@pomaz-ex.szeredi.hu> (raw)
In-Reply-To: <20080508130759.GA30499@unused.rdu.redhat.com> (message from Josef Bacik on Thu, 8 May 2008 09:07:59 -0400)
> > Index: linux.git/mm/filemap.c
> > ===================================================================
> > --- linux.git.orig/mm/filemap.c 2008-05-08 08:17:22.000000000 +0200
> > +++ linux.git/mm/filemap.c 2008-05-08 08:19:59.000000000 +0200
> > @@ -1461,6 +1461,12 @@ page_not_uptodate:
> > */
> > ClearPageError(page);
> > error = mapping->a_ops->readpage(file, page);
> > + if (!error && !PageUptodate(page)) {
>
> Shouldn't you have (!error || error != AOP_TRUNCATED_PAGE),
That would be a rather useless condition (hint: '!error' means 'error == 0')
> since the fs can
> return AOP_TRUNCATED_PAGE if it needs vfs to try the readpage again?
Yep, I din't touch the 'error != 0' codepath.
Miklos
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next prev parent reply other threads:[~2008-05-08 18:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1JtqLW-0005j5-KU@pomaz-ex.szeredi.hu>
2008-05-08 6:47 ` Miklos Szeredi
2008-05-08 13:07 ` Josef Bacik
2008-05-08 18:42 ` Miklos Szeredi [this message]
2008-05-08 18:29 ` Josef Bacik
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