From: Tom Zanussi <zanussi@comcast.net>
Date: Tue, 9 Dec 2008 21:14:10 +0000 (-0800)
Subject: relayfs: fix infinite loop with splice()
X-Git-Tag: v2.6.28-rc8~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbb5b7ae4b442f1923513dc6165a66c7a7f29073;p=pandora-kernel.git

relayfs: fix infinite loop with splice()

Running kmemtraced, which uses splice() on relayfs, causes a hard lock on
x86-64 SMP.  As described by Tom Zanussi:

  It looks like you hit the same problem as described here:

  commit 8191ecd1d14c6914c660dfa007154860a7908857

      splice: fix infinite loop in generic_file_splice_read()

  relay uses the same loop but it never got noticed or fixed.

Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Tested-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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