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SubjectRe: [RFC v4 Patch 0/4] fs/inode.c: optimization for inode lock usage
On Fri, Sep 21, 2012 at 05:31:02PM +0800, Guo Chao wrote:
> This patchset optimizes several places which take the per inode spin lock.
> They have not been fully tested yet, thus they are marked as RFC.
>
> I do limited tests after all patches applied: use two 'find' to traverse the
> filesystems and touch all files in parallel. This runs for several days in a
> virtual machine, no suspicious log appears.

Have you done any performance testing? Taking and releasing a lock which
isn't contended is not particularly expensive.

--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."


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