Messages in this thread | | | Subject | Re: [PATCH v2] fs/select: add vmalloc fallback for select(2) | From | Eric Dumazet <> | Date | Mon, 26 Sep 2016 18:38:44 -0700 |
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On Mon, 2016-09-26 at 17:01 -0700, Andrew Morton wrote:
> I don't share Eric's concerns about performance here. If the vmalloc() > is called, we're about to write to that quite large amount of memory > which we just allocated, and the vmalloc() overhead will be relatively > low.
I did not care of the performance of this particular select() system call really, but other cpus because of more TLB invalidations.
At least CONFIG_DEBUG_PAGEALLOC=y builds should be impacted, but maybe we do not care.
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