linux-kernel - [RFC] block: io_context refcount fixes

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Date:	Fri,  4 Dec 2009 14:52:40 +0100
From:	Louis Rilling <louis.rilling@...labs.com>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [RFC] block: io_context refcount fixes


Hi,

When reading copy_io() I found probable refcounting issues with shared
io_context. IIUC, the following two patches could fix those issues.
If I am correct, then those fixes should go to stable too.

Based on v2.6.32 and compile-tested only.

Thanks,

Louis

Louis Rilling (2):
      block: Fix io_context leak after clone with CLONE_IO
      block: Fix io_context leak after failure of clone with CLONE_IO

 block/blk-ioc.c           |   12 ++++++------
 include/linux/iocontext.h |    5 +++--
 kernel/exit.c             |    2 +-
 kernel/fork.c             |    3 ++-
 4 files changed, 12 insertions(+), 10 deletions(-)
-- 
Dr Louis Rilling			Kerlabs
Skype: louis.rilling			Batiment Germanium
Phone: (+33|0) 6 80 89 08 23		80 avenue des Buttes de Coesmes
http://www.kerlabs.com/			35700 Rennes
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