On Thu, Jun 08, 2017 at 07:37:14AM +0100, Maciej W. Rozycki wrote: > On Wed, 31 May 2017, David Daney wrote: > > > > > The subsection keeps the code for the (hopefully) cold path out of line > > > > which should result in a smaller cache footprint in the hot path. > > > > > > Hmm, yes that would make sense if it did something useful there, but it > > > just immediately jumps back to the ll. > > > > In this case, it could be that the pattern was copied without carefully > > examining what was being done. > > A PAUSE might be in order here. Quite possibly, though I'm not sure its worth bothering to optimise this old/unused code. I had a patch somewhere to add PAUSE to spinlock loops... Cheers James
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