From: Manfred Spraul <manfred@colorfullife.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] cleanup of ipc/msg.c
Date: Sun, 04 Jul 2004 00:09:50 +0200 [thread overview]
Message-ID: <40E72EAE.2060806@colorfullife.com> (raw)
Hi,
Attached is a cleanup of the main loops in sys_msgrcv and sys_msgsnd,
based on ipc_lock_by_ptr(). Most backward gotos are gone, instead normal
"for(;;)" loops until a suitable message is found.
Additionally, the patch
- reintroduces lockless receive, same implementation as in ipc/mqueue.c.
- fixes a rare BUG(): if queue settings are changed with
msgctl(,IPC_SET,) while a thread is sleeping in msgrcv() and the queue
is then destroyed with msgctl(,IPC_RMID,) before the sleeping thread
noticed the new configuration, then the BUG() is line 764 would trigger.
Andrew, could you add it to -mm? If it's too large then I'll split out
the bugfix, it's a oneliner [remove the BUG()].
Signed-Off-By: Manfred Spraul <manfred@colorfullife.com>
next reply other threads:[~2004-07-03 22:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-03 22:09 Manfred Spraul [this message]
2004-07-04 11:49 ` [PATCH] cleanup of ipc/msg.c Manfred Spraul
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