Re: [PATCH V2] staging: android: lowmemorykiller: imporve lmk to avoid deadlock issue

From: Joe Perches
Date: Mon Aug 03 2015 - 03:58:29 EST


On Mon, 2015-08-03 at 09:15 +0300, Dan Carpenter wrote:
> On Mon, Aug 03, 2015 at 05:53:22AM +0000, Wang, Biao wrote:
> > Consider the following case:
> > Task A trigger lmk with a lock held, while task B try to
> > get this lock, but unfortunately B is the very culprit task lmk
> > select to
> > kill. Then B will never be killed, and A will forever select B to
> > kill.
> > Such dead lock will trigger softlock up issue.
> >
> > This patch try to pick the next task to break this loop.
> >
> > Signed-off-by: Wang Biao <biao.wang@xxxxxxxxx>
> > Reviewed-by: Zhang Di <di.zhang@xxxxxxxxx>
> > Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> I don't really feel comfortable saying I reviewed this code. I just
> commented on a few process issues. I don't know the subsystem well
> enough to give it a seal of approval.
>
> > Reviewed-by: Joe Perches <joe@xxxxxxxxxxx>

Please don't say I reviewed this either.

I may have commented on it, but I certainly
did't add a "Reviewed-by" signature.

Please don't add signatures unless people
specifically state so.

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