From: Thomas Gleixner <tglx@linutronix.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
the arch/x86 maintainers <x86@kernel.org>
Subject: Re: [GIT pull] x86/urgent for v5.9-rc2
Date: Mon, 31 Aug 2020 09:12:47 +0200 [thread overview]
Message-ID: <87mu2bi900.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <CAHk-=wj16dFx2Mx1oO2oxhJjAmsaPOqLcGvEGb86-z+v5iu5tw@mail.gmail.com>
On Sun, Aug 30 2020 at 12:13, Linus Torvalds wrote:
> On Sun, Aug 30, 2020 at 11:04 AM Thomas Gleixner <tglx@linutronix.de> wrote:
>>
>> The historical inconsistent for_each_cpu() behaviour of
>> ignoring the cpumask and unconditionally claiming that CPU0 is in the
>> mask struck again. Sigh.
>
> I guess we could remove the UP optimizations these days. It's not like
> they matter like they used to.
Indeed.
> Or leave the optimizations in the sense that they wouldn't do the
> crazy bit searching, but they could look at bit 0 of the mask they're
> passed..
Yes, that's trivial enough and the compiler should turn the whole thing
into a simple conditional checking bit 0 and remove the rest of the loop
gunk.
Thanks,
tglx
next prev parent reply other threads:[~2020-08-31 7:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-30 18:03 [GIT pull] irq/urgent for v5.9-rc2 Thomas Gleixner
2020-08-30 18:03 ` [GIT pull] locking/urgent " Thomas Gleixner
2020-08-30 19:15 ` pr-tracker-bot
2020-08-30 18:03 ` [GIT pull] sched/urgent " Thomas Gleixner
2020-08-30 18:54 ` Linus Torvalds
2020-08-31 6:41 ` Marco Elver
2020-08-31 7:24 ` peterz
2020-08-31 7:38 ` Marco Elver
2020-08-30 19:15 ` pr-tracker-bot
2020-08-30 18:03 ` [GIT pull] x86/urgent " Thomas Gleixner
2020-08-30 19:13 ` Linus Torvalds
2020-08-31 7:12 ` Thomas Gleixner [this message]
2020-08-30 19:15 ` pr-tracker-bot
2020-08-30 19:15 ` [GIT pull] irq/urgent " pr-tracker-bot
-- strict thread matches above, loose matches on Subject: below --
2020-08-23 8:25 [GIT pull] core/urgent " Thomas Gleixner
2020-08-23 8:25 ` [GIT pull] x86/urgent " Thomas Gleixner
2020-08-23 18:29 ` Linus Torvalds
2020-08-23 22:00 ` Thomas Gleixner
2020-08-23 22:29 ` Linus Torvalds
2020-08-23 22:26 ` Andy Lutomirski
2020-08-23 22:35 ` Linus Torvalds
2020-08-23 23:12 ` Andy Lutomirski
2020-08-23 18:39 ` pr-tracker-bot
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