linux-kernel - Re: [PATCH] aio: fix kernel bug when page is temporally busy

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Date:	Thu, 8 Feb 2007 21:52:37 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Ananiev, Leonid I" <leonid.i.ananiev@...el.com>
Cc:	<linux-kernel@...r.kernel.org>, "linux-aio" <linux-aio@...ck.org>,
	"Zach Brown" <zach.brown@...cle.com>, <suparna@...ibm.com>,
	"Chris Mason" <chris.mason@...cle.com>,
	"Badari Pulavarty" <pbadari@...ibm.com>
Subject: Re: [PATCH] aio: fix kernel bug when page is  temporally busy

On Fri, 9 Feb 2007 08:41:41 +0300 "Ananiev, Leonid I" <leonid.i.ananiev@...el.com> wrote:

> 
> > invalidate_inode_pages2() has other callers.  I suspect with this
> change
> > we'll end up leaking EIOCBRETRY back to userspace.
> 
> EIOCBRETRY is used and caught already in do_sync_read() and
> do_sync_readv_writev().

To pick one example:

	nfs_follow_link
	->nfs_revalidate_mapping_nolock
	  ->nfs_invalidate_mapping_nolock
	    ->invalidate_inode_pages2

so that, I assume, affects open(), unlink(), etc.


> Below fixed patch against kernel 2.6.20.

The tab->spaces issue is fixed, but it's still all wordwrapped.

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