Thread (86 messages) 86 messages, 13 authors, 2011-06-18

Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex

From: Andi Kleen <hidden>
Date: 2011-06-15 22:15:39
Also in: lkml

(needing to know the
number of cpus to optimize locking sounds like a trainwreck all of its
own, needing it _that_ often instead of just once at startup is even
worse).
libdb does it only once per startup, it's just that it gets restarted 
for every
child (it's a library, not a server)

Really the kernel just needs to provide a faster way to get that.
Requiring /proc/stat for that is just insane.

I'll resend the sysconf patchkit I guess :-)

-Andi


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