On 28.12.2012 10:01, Zhouping Liu wrote:
On 12/28/2012 10:45 AM, Zhouping Liu wrote:
Thank you for the report Zhouping!
Would you be so kind to test the following patch and report results?
Apply the patch to the latest mainline.
Hello Zlatko,
I have tested the below patch(applied it on mainline directly),
but IMO, I'd like to say it maybe don't fix the issue completely.
Hi Zlatko,
I re-tested it on another machine, which has 60+ Gb RAM and 4 numa nodes,
without your patch, it's easy to reproduce the 'NULL pointer' error,
after applying your patch, I couldn't reproduce the issue any more.
depending on the above, it implied that your patch fixed the issue.
Yes, that's exactly what I expected. Just wanted to doublecheck this
time. Live and learn. ;)
but in my last mail, I tested it on two machines, which caused hung task
with your patch,
so I'm confusing is it your patch block some oom-killer performance? if
it's not, your patch is good for me.
From what I know, the patch shouldn't have much influence on the oom
killer, if any. But, as all those subsystems are closely interconnected,
both oom & vmscan code is mm after all, there could be some
interference. Is the hung-task issue repeatable?
--
Zlatko
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