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Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit

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From: Paul Menage
Subject: Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit
Date: Monday, August 11, 2008 - 5:43 pm

On Mon, Aug 11, 2008 at 5:31 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:

The main thing this fixes is the memrlimit controller, which is only
in -mm. But there's also a dereference of mm->owner in memcontrol.c -
and I think that needs to be fixed to handle a possible NULL mm->owner
too, since in the case of a swapoff racing with the last user of an mm
exiting, I suspect that the swapoff code could try to pull in a page
that gets charged to the mm after its owner has been set to NULL.

Paul
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Messages in current thread:
[-mm][PATCH 0/2] Memory rlimit fix crash on fork, Balbir Singh, (Mon Aug 11, 3:07 am)
[-mm][PATCH 1/2] mm owner fix race between swap and exit, Balbir Singh, (Mon Aug 11, 3:07 am)
[-mm][PATCH 2/2] Memory rlimit enhance mm_owner_changed ca ..., Balbir Singh, (Mon Aug 11, 3:07 am)
Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit, Andrew Morton, (Mon Aug 11, 5:31 pm)
Re: [-mm][PATCH 2/2] Memory rlimit enhance mm_owner_change ..., Paul Menage, (Mon Aug 11, 5:39 pm)
Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit, Paul Menage, (Mon Aug 11, 5:43 pm)
Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit, Balbir Singh, (Mon Aug 11, 9:06 pm)
Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit, Andrew Morton, (Mon Aug 11, 9:56 pm)
Re: [-mm][PATCH 1/2] mm owner fix race between swap and exit, Balbir Singh, (Mon Aug 11, 10:04 pm)
Re: [-mm][PATCH 0/2] Memory rlimit fix crash on fork, Andrew Morton, (Tue Aug 12, 5:14 pm)
Re: [-mm][PATCH 0/2] Memory rlimit fix crash on fork, Balbir Singh, (Tue Aug 12, 6:24 pm)
Re: [-mm][PATCH 0/2] Memory rlimit fix crash on fork, Balbir Singh, (Tue Aug 12, 7:07 pm)