Messages in this thread | | | From | Catalin Marinas <> | Subject | Re: kmemleak, cpu usage jump out of nowhere | Date | Wed, 14 Jul 2010 10:57:33 +0100 |
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Zeno Davatz <zdavatz@gmail.com> wrote: > I got a new Intel core-8 i7 processor. > > I am on kernel uname -a > > Linux zenogentoo 2.6.35-rc5 #97 SMP Tue Jul 13 16:13:25 CEST 2010 i686 > Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz GenuineIntel GNU/Linux > > Sometimes in the middle of nowhere all of a sudden all of my 8-cores > are at 100% CPU usage and my machine really lags and hangs and is not > useable anymore. Some random process just grabs a bunch CPUs according > to htop. > > dmesg tell me that > > kmemleak: 38 new suspected memory leaks (see /sys/kernel/debug/kmemleak) > kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) > kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak) > kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) > kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) > kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
These may be related to the NO_BOOTMEM configuration (I sent a patch in a separate reply).
But even when kmemleak scans the memory, it only uses a single thread and you should only see a single CPU going to 100%. I don't think kmemleak scanning can explain why all the 8 cores are going up to 100%.
-- Catalin
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