linux-kernel - Re: nfs mmap adventure (was: 2.6.23-mm1)

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Message-Id: <1192462998.7529.3.camel@heimdal.trondhjem.org>
Date:	Mon, 15 Oct 2007 11:43:18 -0400
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
	Nick Piggin <nickpiggin@...oo.com.au>
Subject: Re: nfs mmap adventure (was: 2.6.23-mm1)


On Mon, 2007-10-15 at 14:28 +0200, Peter Zijlstra wrote:
> I get funny SIGBUS' like so:
> 
> fault
>   if (->page_mkwrite() < 0)
>     nfs_vm_page_mkwrite()
>       nfs_write_begin()
>         nfs_flush_incompatible()
>           nfs_wb_page()
>             nfs_wb_page_priority()
>               nfs_sync_mapping_wait()
>                 nfs_wait_on_request_locked()
>                   nfs_wait_on_request()
>                     nfs_wait_bit_interruptible()
>                       return -ERESTARTSYS
>     SIGBUS
> 
> trying to figure out what to do about this...

Why? If someone is interrupting the write, then a SIGBUS is pretty much
expected.

  Trond

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