* SIGBUS accessing MAP_HUGETLB space w/ nr_overcommit == 0
@ 2013-05-29 1:42 Andy Lutomirski
0 siblings, 0 replies; only message in thread
From: Andy Lutomirski @ 2013-05-29 1:42 UTC (permalink / raw)
To: linux-mm
I switched a system from Linux 3.5 to 3.9.4, and I have some crashes
that I didn't have before. The cause is a SIGBUS w/ code BUS_ADRERR
on what I presume is the first access to a MAP_HUGETLB | MAP_PRIVATE
page. I have nr_overcommit_hugepages == 0, so this shouldn't happen.
There are no kernel log messages at all.
Is there possibly a regression here? Nothing seems to be asserting
any invariants with respect to the freelist size and the number of
accounted free hugepages.
I do not have CONFIG_CGROUP_HUGETLB set.
Thanks,
Andy
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