RFT Exposing Zone Sleeps
seanbru at yahoo-inc.com
Mon Jun 14 17:43:11 UTC 2010
So, after some modifications and guidance from rwatson, alc and others,
I've modified this patch a bit. The end result is that a sleep on slab
alloc counter is displayed with a "vmstat -z". This can be used for
diagnostics of low memory situations and has been VERY handy at Yahoo.
I've removed the sysctl to eliminate some heartache, moved the sleep
count into a proper place in the data structure, properly instrumented
the debugger function and returned the #ifdef.
Patch provided against -current. Tested on amd64 and x86
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