Messages in this thread | | | Date | Fri, 20 May 2022 17:24:07 +0200 | From | "Jason A. Donenfeld" <> | Subject | Re: [PATCH] char/mem: only use {read,write}_iter, not the old {read,write} functions |
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Hi Al,
On Fri, May 20, 2022 at 03:09:19PM +0000, Al Viro wrote: > On Fri, May 20, 2022 at 03:50:30PM +0200, Jason A. Donenfeld wrote: > > Currently mem.c implements both the {read,write}_iter functions and the > > {read,write} functions. But with {read,write} going away at some point > > in the future, > > Not likely to happen, unfortunately. > > > and most kernel code made to prefer {read,write}_iter, > > there's no point in keeping around the old code. > > Profile and you'll see ;-/
Huh, yea, I lose around 1 GiB/s of perf on my machine sending /dev/zero into /dev/null.
Jason
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