From: Joe Perches <joe@perches.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Wang, Biao" <biao.wang@intel.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"arve@android.com" <arve@android.com>,
"riandrews@android.com" <riandrews@android.com>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Zhang, Di" <di.zhang@intel.com>, "Li, Fei" <fei.li@intel.com>
Subject: Re: [PATCH V2] staging: android: lowmemorykiller: imporve lmk to avoid deadlock issue
Date: Mon, 03 Aug 2015 00:58:17 -0700 [thread overview]
Message-ID: <1438588697.30149.12.camel@perches.com> (raw)
In-Reply-To: <20150803061556.GS5096@mwanda>
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@intel.com>
> > Reviewed-by: Zhang Di <di.zhang@intel.com>
> > Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> 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@perches.com>
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.
next prev parent reply other threads:[~2015-08-03 7:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-03 5:53 [PATCH V2] staging: android: lowmemorykiller: imporve lmk to avoid deadlock issue Wang, Biao
2015-08-03 6:15 ` Dan Carpenter
2015-08-03 7:16 ` Dan Carpenter
2015-08-03 7:58 ` Joe Perches [this message]
2015-08-03 14:06 ` Dave Hansen
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