Messages in this thread | | | Date | Wed, 8 Feb 2012 17:08:08 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH 3/8] arm: Fix possible race on task->mm |
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On 02/07, Anton Vorontsov wrote: > > Checking for task->mm is dangerous as ->mm might disappear (exit_mm() > assigns NULL under task_lock(), so tasklist lock is not enough). > > We can't use get_task_mm()/mmput() pair as mmput() might sleep,
Yes, but
> so let's take the task lock while we care about its mm.
it seems that this needs find_lock_task_mm() too ?
the same for the rest patches in this series.
Oleg.
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