Messages in this thread | | | Date | Thu, 2 Aug 2007 09:03:19 -0400 | Subject | Re: SD still better than CFS for 3d ?(was Re: 2.6.23-rc1) | From | "J. Bruce Fields" <> |
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On Wed, Aug 01, 2007 at 10:35:41PM -0400, Lee Revell wrote: > On 7/31/07, Ingo Molnar <mingo@elte.hu> wrote: > > Almost all of the Reiser3 > > code runs under the BKL, and the only other major kernel infrastructure > > that has BKL dependencies is the TTY code. > > Also NFS: > > $ grep -rIi lock_kernel kernel-source/linux-2.6.17/fs/nfs/ | wc -l > 94
All the file locking code (the nfs-related stuff in fs/lockd/, and also the vfs code in fs/locks.c) is under the kernel lock. I doubt it's held very long unless you have ridiculous numbers of processes requesting locks on the same file, but I don't know.
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