[Ocfs2-devel] [PATCH 1/1] ocfs2 fix o2dlm dlm run purgelist (rev 3)

[Joel Becker]

On Mon, Jul 19, 2010 at 04:04:12PM -0700, Srinivas Eeda wrote:
> This patch fixes two problems in dlm_run_purgelist
> 
> 1. If a lockres is found to be in use, dlm_run_purgelist keeps trying to purge
> the same lockres instead of trying the next lockres.
> 
> 2. When a lockres is found unused, dlm_run_purgelist releases lockres spinlock
> before setting DLM_LOCK_RES_DROPPING_REF and calls dlm_purge_lockres.
> spinlock is reacquired but in this window lockres can get reused. This leads
> to BUG.
> 
> This patch modifies dlm_run_purgelist to skip lockres if it's in use and purge
>  next lockres. It also sets DLM_LOCK_RES_DROPPING_REF before releasing the
> lockres spinlock protecting it from getting reused.
> 
> Signed-off-by: Srinivas Eeda <srinivas.eeda at oracle.com>
> Acked-by: Sunil Mushran <sunil.mushran at oracle.com>

This patch is now in the fixes branch of ocfs2.git.

Joel

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"To fall in love is to create a religion that has a fallible god."
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Joel Becker
Consulting Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127