Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 24 Jan 2023 16:40:56 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] x86/fpu: don't set TIF_NEED_FPU_LOAD for PF_IO_WORKER threads |
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On Tue, Jan 24, 2023 at 08:23:20AM -0700, Jens Axboe wrote: > We don't set it on PF_KTHREAD threads as they never return to userspace, > and PF_IO_WORKER threads are identical in that regard. As they keep > running in the kernel until they die, skip setting the FPU flag on them.
No objection to the actual patch; but this changelog fails to tell us why this is important.
What made you get up and write this patch :-) Presumably this is a performance issue? If so, can you quantify how much?
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