From: Mark Fasheh <mfasheh@suse.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH 9/9] ocfs2/dlm: Fix race during lockres mastery
Date: Tue, 16 Dec 2008 17:30:22 -0800 [thread overview]
Message-ID: <20081217013022.GC8791@wotan.suse.de> (raw)
In-Reply-To: <1229471363-15887-10-git-send-email-sunil.mushran@oracle.com>
On Tue, Dec 16, 2008 at 03:49:23PM -0800, Sunil Mushran wrote:
> dlm_get_lock_resource() is supposed to return a lock resource with a proper
> master. If multiple concurrent threads attempt to lookup the lockres for the
> same lockid while the lock mastery in underway, one or more threads are likely
> to return a lockres without a proper master.
>
> This patch makes the threads wait in dlm_get_lock_resource() while the mastery
> is underway, ensuring all threads return the lockres with a proper master.
>
> This issue is known to be limited to users using the flock() syscall. For all
> other fs operations, the ocfs2 dlmglue layer serializes the dlm op for each
> lockid.
>
> Patch fixes Novell bz#425491
> https://bugzilla.novell.com/show_bug.cgi?id=425491
Btw, removed the bz url because the bug isn't globally readable. I don't
know if that's an official policy or anything, I just figured that since
only a limited set could read it...
--Mark
--
Mark Fasheh
next prev parent reply other threads:[~2008-12-17 1:30 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-16 23:49 [Ocfs2-devel] Patches for the next merge window Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 1/9] ocfs2/hb: Exposes list of heartbeating nodes via debugfs Sunil Mushran
2008-12-17 1:08 ` Mark Fasheh
2008-12-17 9:03 ` tristan.ye
2008-12-17 18:52 ` Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 2/9] ocfs2: Moves struct recovery_map to a header file Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 3/9] ocfs2: Exposes the file system state via debugfs Sunil Mushran
2008-12-17 1:16 ` Mark Fasheh
2008-12-17 19:18 ` Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 4/9] ocfs2: Remove debugfs file local_alloc_stats Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 5/9] ocfs2/dlm: Fixes race between migrate request and exit domain Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 6/9] ocfs2/dlm: Clean errors in dlm_proxy_ast_handler() Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 7/9] ocfs2/dlm: Hold off sending lockres drop ref message while lockres is migrating Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 8/9] ocfs2/dlm: Fix race in adding/removing lockres' to/from the tracking list Sunil Mushran
2008-12-16 23:49 ` [Ocfs2-devel] [PATCH 9/9] ocfs2/dlm: Fix race during lockres mastery Sunil Mushran
2008-12-17 0:25 ` Mark Fasheh
2008-12-17 0:40 ` Sunil Mushran
2008-12-17 1:30 ` Mark Fasheh [this message]
2008-12-23 21:05 ` Coly Li
2008-12-23 21:06 ` Sunil Mushran
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