Re: [patch 4/6] x86: finish user fault error path with fatal signal

[KOSAKI Motohiro]

(7/25/13 6:25 PM), Johannes Weiner wrote:
> The x86 fault handler bails in the middle of error handling when the
> task has a fatal signal pending.  For a subsequent patch this is a
> problem in OOM situations because it relies on
> pagefault_out_of_memory() being called even when the task has been
> killed, to perform proper per-task OOM state unwinding.
> 
> Shortcutting the fault like this is a rather minor optimization that
> saves a few instructions in rare cases.  Just remove it for
> user-triggered faults.
> 
> Use the opportunity to split the fault retry handling from actual
> fault errors and add locking documentation that reads suprisingly
> similar to ARM's.
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>

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