Messages in this thread | | | Date | Wed, 18 Aug 2010 14:54:56 -0400 | From | "J. Bruce Fields" <> | Subject | Re: Proposal: Use hi-res clock for file timestamps |
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On Wed, Aug 18, 2010 at 07:50:40PM +0200, Andi Kleen wrote: > > - nfsd updates it whenever it reads an mtime out of an inode that matches > > current_fs_time to the granularity of 1/HZ. > > That means you have a very very hot cache line on a larger system > if there are a lot of mtime changes. Probably a bad idea.
Only if those mtime changes are also followed immediately by nfsd reads of the mtime.
That will be the typical case for nfsd writes, though.
--b.
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