Messages in this thread | | | Date | Sun, 9 Dec 2012 23:17:09 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCH 00/49] Automatic NUMA Balancing v10 |
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On Sun, Dec 09, 2012 at 08:36:31PM +0000, Mel Gorman wrote: > Either way, last night I applied a patch on top of latest tip/master to > remove the nr_cpus_allowed check so that numacore would be enabled again > and tested that. In some places it has indeed much improved. In others > it is still regressing badly and in two case, it's corrupting memory -- > specjbb when THP is enabled crashes when running for single or multiple > JVMs. It is likely that a zero page is being inserted due to a race with > migration and causes the JVM to throw a null pointer exception. Here is > the comparison on the rough off-chance you actually read it this time.
Are you talking about huge zero page, right?
I've fixed a race in huge zero page implementation recently[1]. Symptoms were similar -- SIGSEGV in JVM. The patch is in mmotm-2012-12-05-16-56 and later.
[1] http://lkml.org/lkml/2012/11/30/279 -- Kirill A. Shutemov
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