Messages in this thread | | | Date | Wed, 23 Aug 2000 19:24:50 +0100 (BST) | From | Tigran Aivazian <> | Subject | Re: [patch-2.4.0-test7-pre7] do_fork() optimization. |
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On Wed, 23 Aug 2000, Linus Torvalds wrote: > > On Wed, 23 Aug 2000, Tigran Aivazian wrote: > > > > I was thinking if I could get a few more cycles out of do_fork() (the > > recent SCO propaganda about their _lwp_create(2) being faster than our > > clone(2) made me think). And I noticed that get_pid() doesn't actually > > need the lastpid_lock because it is only ever called from do_fork() inside > > the lock_kernel(). So, here is the obvious patch. > > Hmm.. I'd rather get rid of the _other_ spinlock, namely the kernel lock. > > I don't actually see anything that requires or even _wants_ the kernel > lock anywhere. Can anybody tell me what I'm missing? >
I will test without BKL on my SMP and let you know. The code seems fine but I may be blind...
regards, Tigran
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