Messages in this thread | | | Date | Thu, 18 Dec 2014 12:48:11 -0500 (EST) | Subject | Re: [PATCH] sparc32: destroy_context() and switch_mm() needs to disable interrupts. | From | David Miller <> |
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From: Andreas Larsson <andreas@gaisler.com> Date: Thu, 18 Dec 2014 13:23:23 +0100
> Load balancing can be triggered in the critical sections protected by > srmmu_context_spinlock in destroy_context() and switch_mm() and can hang > the cpu waiting for the rq lock of another cpu that in turn has called > switch_mm hangning on srmmu_context_spinlock leading to deadlock. > > So, disable interrupt while taking srmmu_context_spinlock in > destroy_context() and switch_mm() so we don't deadlock. > > See also commit 77b838fa1ef0 ("[SPARC64]: destroy_context() needs to disable > interrupts.") > > Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Looks good, applied, thanks Andreas.
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