Messages in this thread | | | Date | Mon, 31 Aug 2009 18:26:40 +0800 | From | Wu Fengguang <> | Subject | [RFC][PATCH 0/4] memcg: add support for hwpoison testing |
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Hi all,
In hardware poison testing, we want to inject hwpoison errors to pages of a collection of selected tasks, so that random tasks (eg. init) won't be killed in stress tests and lead to test failure.
Memory cgroup provides an ideal tool for tracking and testing these target process pages. All we have to do is to - export the memory cgroup id via cgroupfs - export two functions/structs for hwpoison_inject.c
This might be an unexpected usage of memory cgroup. The last patch and this script demonstrates how the exported interfaces are to be used to limit the scope of hwpoison injection.
test -d /cgroup/hwpoison && rmdir /cgroup/hwpoison mkdir /cgroup/hwpoison
usemem -m 100 -s 100 & # eat 100MB and sleep 100s echo `pidof usemem` > /cgroup/hwpoison/tasks
==> memcg_id=$(</cgroup/hwpoison/memory.id) ==> echo $memcg_id > /debug/hwpoison/corrupt-filter-memcg
# hwpoison all pfn pfn=0 while true do let pfn=pfn+1 echo $pfn > /debug/hwpoison/corrupt-pfn if [ $? -ne 0 ]; then break fi done
Comments are welcome, thanks!
Cheers, Fengguang --
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