* [Cluster-devel] [PATCH][GFS2] - bz 272021: GFS2 - flocks from same process trip kernel BUG at fs/gfs2/glock.c:1118!
@ 2007-09-14 4:35 Abhijith Das
2007-09-14 12:26 ` [Cluster-devel] " Steven Whitehouse
0 siblings, 1 reply; 2+ messages in thread
From: Abhijith Das @ 2007-09-14 4:35 UTC (permalink / raw)
To: cluster-devel.redhat.com
This patch adds a new flag to the gfs2_holder structure GL_FLOCK.
It is set on holders of glocks representing flocks. This flag is
checked in add_to_queue() and a process is permitted to queue more
than one holder onto a glock if it is set. This solves the issue
of a process not being able to do multiple flocks on the same file.
Through a single descriptor, a process can now promote and demote
flocks. Through multiple descriptors a process can now queue
multiple flocks on the same file. There's still the problem of
a process deadlocking itself (because gfs2 blocking locks are not
interruptible) by queueing incompatible deadlock.
Signed-off-by: Abhijith Das <adas@redhat.com>
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* [Cluster-devel] Re: [PATCH][GFS2] - bz 272021: GFS2 - flocks from same process trip kernel BUG at fs/gfs2/glock.c:1118!
2007-09-14 4:35 [Cluster-devel] [PATCH][GFS2] - bz 272021: GFS2 - flocks from same process trip kernel BUG at fs/gfs2/glock.c:1118! Abhijith Das
@ 2007-09-14 12:26 ` Steven Whitehouse
0 siblings, 0 replies; 2+ messages in thread
From: Steven Whitehouse @ 2007-09-14 12:26 UTC (permalink / raw)
To: cluster-devel.redhat.com
Hi,
Now in the -nmw git tree. Thanks,
Steve.
On Thu, 2007-09-13 at 23:35 -0500, Abhijith Das wrote:
> This patch adds a new flag to the gfs2_holder structure GL_FLOCK.
> It is set on holders of glocks representing flocks. This flag is
> checked in add_to_queue() and a process is permitted to queue more
> than one holder onto a glock if it is set. This solves the issue
> of a process not being able to do multiple flocks on the same file.
> Through a single descriptor, a process can now promote and demote
> flocks. Through multiple descriptors a process can now queue
> multiple flocks on the same file. There's still the problem of
> a process deadlocking itself (because gfs2 blocking locks are not
> interruptible) by queueing incompatible deadlock.
>
> Signed-off-by: Abhijith Das <adas@redhat.com>
>
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2007-09-14 4:35 [Cluster-devel] [PATCH][GFS2] - bz 272021: GFS2 - flocks from same process trip kernel BUG at fs/gfs2/glock.c:1118! Abhijith Das
2007-09-14 12:26 ` [Cluster-devel] " Steven Whitehouse
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