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Subject[PATCH 0/2] x86: fix memory leaks when doing CPU hotplug
Following patches fix two memory leaks with CPU hotplug.
Some per CPU data is allocated each time a CPU is set online.
But this space is never freed.

Usually this memory leak is not a big deal (for normal CPU hotplug usage).
But during stress tests with lots of CPU offline/online cycles this
really matters.

The entire leak is 40K (10 pages) for each offline/online cycle per
CPU. I've verified both fixes performing more than 90000 CPU
offline/online cycles.

This is not a regression but I think it's still 2.6.27 material.
Please apply.


Regards,

Andreas


BTW, there is still a leak of about 600 bytes per offline/online cycle
per CPU -- according to slabinfo this might be sysfs related. The most
suspicious entries are:

Name Objects Objsize Space Slabs/Part/Cpu O/S O %Fr %Ef Flg
sysfs_dir_cache 266085 80 41.9M 10235/4/0 26 0 0 50 PZFU
kmalloc-8 130870 8 10.5M 2568/5/0 51 0 0 9 PZFU




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