From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Nick Piggin <npiggin-l3A5Bk7waGM@public.gmane.org>
Cc: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
shaggy-V7BBcbaFuwjMbYB6QlFGEg@public.gmane.org,
axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Clark Williams <williams-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
Subject: Re: [patch 2/2]: introduce fast_gup
Date: Tue, 22 Apr 2008 10:19:08 +0300 [thread overview]
Message-ID: <480D916C.4030100@qumranet.com> (raw)
In-Reply-To: <20080422032319.GB21993-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
Nick Piggin wrote:
> That's horrible ;)
>
> Anyway guys you are missing the other side of the equation -- that whenever
> _PAGE_PRESENT is cleared, all CPUs where current->mm might be == mm have to
> have a tlb flush. And we're holding off tlb flushes in fast_gup, that's the
> whole reason why it all works.
>
>
Ah, clever. Thanks.
--
error compiling committee.c: too many arguments to function
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@qumranet.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
shaggy@austin.ibm.com, axboe@kernel.dk, linux-mm@kvack.org,
linux-arch@vger.kernel.org, Clark Williams <williams@redhat.com>,
Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [patch 2/2]: introduce fast_gup
Date: Tue, 22 Apr 2008 10:19:08 +0300 [thread overview]
Message-ID: <480D916C.4030100@qumranet.com> (raw)
Message-ID: <20080422071908.xNyt0Fl0uvMDPq4s25I3fkk3PDvWyJyclWimkbOwDe0@z> (raw)
In-Reply-To: <20080422032319.GB21993@wotan.suse.de>
Nick Piggin wrote:
> That's horrible ;)
>
> Anyway guys you are missing the other side of the equation -- that whenever
> _PAGE_PRESENT is cleared, all CPUs where current->mm might be == mm have to
> have a tlb flush. And we're holding off tlb flushes in fast_gup, that's the
> whole reason why it all works.
>
>
Ah, clever. Thanks.
--
error compiling committee.c: too many arguments to function
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@qumranet.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
shaggy@austin.ibm.com, axboe@kernel.dk, linux-mm@kvack.org,
linux-arch@vger.kernel.org, Clark Williams <williams@redhat.com>,
Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [patch 2/2]: introduce fast_gup
Date: Tue, 22 Apr 2008 10:19:08 +0300 [thread overview]
Message-ID: <480D916C.4030100@qumranet.com> (raw)
In-Reply-To: <20080422032319.GB21993@wotan.suse.de>
Nick Piggin wrote:
> That's horrible ;)
>
> Anyway guys you are missing the other side of the equation -- that whenever
> _PAGE_PRESENT is cleared, all CPUs where current->mm might be == mm have to
> have a tlb flush. And we're holding off tlb flushes in fast_gup, that's the
> whole reason why it all works.
>
>
Ah, clever. Thanks.
--
error compiling committee.c: too many arguments to function
--
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next prev parent reply other threads:[~2008-04-22 7:19 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-28 2:54 [patch 0/2]: lockless get_user_pages patchset Nick Piggin
2008-03-28 2:54 ` Nick Piggin
2008-03-28 2:54 ` Nick Piggin
[not found] ` <20080328025455.GA8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-03-28 2:55 ` [patch 1/2]: x86: implement pte_special Nick Piggin
2008-03-28 2:55 ` Nick Piggin
2008-03-28 2:55 ` Nick Piggin
[not found] ` <20080328025541.GB8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-03-28 3:23 ` David Miller
2008-03-28 3:23 ` David Miller, Nick Piggin
2008-03-28 3:23 ` David Miller
[not found] ` <20080327.202334.250213398.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2008-03-28 3:31 ` Nick Piggin
2008-03-28 3:31 ` Nick Piggin
2008-03-28 3:31 ` Nick Piggin
[not found] ` <20080328033149.GD8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-03-28 3:44 ` David Miller
2008-03-28 3:44 ` David Miller, Nick Piggin
2008-03-28 3:44 ` David Miller
[not found] ` <20080327.204431.201380891.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2008-03-28 4:04 ` Nick Piggin
2008-03-28 4:04 ` Nick Piggin
2008-03-28 4:04 ` Nick Piggin
[not found] ` <20080328040442.GE8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-03-28 4:09 ` David Miller
2008-03-28 4:09 ` David Miller, Nick Piggin
2008-03-28 4:09 ` David Miller
[not found] ` <20080327.210910.101408473.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2008-03-28 4:15 ` Nick Piggin
2008-03-28 4:15 ` Nick Piggin
2008-03-28 4:15 ` Nick Piggin
[not found] ` <20080328041519.GF8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-03-28 4:16 ` David Miller
2008-03-28 4:16 ` David Miller, Nick Piggin
2008-03-28 4:16 ` David Miller
[not found] ` <20080327.211632.02770342.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2008-03-28 4:19 ` Nick Piggin
2008-03-28 4:19 ` Nick Piggin
2008-03-28 4:19 ` Nick Piggin
2008-03-28 4:17 ` Nick Piggin
2008-03-28 4:17 ` Nick Piggin
2008-03-28 4:17 ` Nick Piggin
2008-03-28 3:00 ` [patch 2/2]: introduce fast_gup Nick Piggin
2008-03-28 3:00 ` Nick Piggin
2008-03-28 3:00 ` Nick Piggin
[not found] ` <20080328030023.GC8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-03-28 10:01 ` Jens Axboe
2008-03-28 10:01 ` Jens Axboe
2008-03-28 10:01 ` Jens Axboe
2008-04-17 15:03 ` Peter Zijlstra
2008-04-17 15:03 ` Peter Zijlstra
2008-04-17 15:03 ` Peter Zijlstra
2008-04-17 15:25 ` Linus Torvalds
2008-04-17 15:25 ` Linus Torvalds
2008-04-17 15:25 ` Linus Torvalds
[not found] ` <alpine.LFD.1.00.0804170814090.2879-5CScLwifNT1QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
2008-04-17 16:12 ` Peter Zijlstra
2008-04-17 16:12 ` Peter Zijlstra
2008-04-17 16:12 ` Peter Zijlstra
2008-04-17 16:18 ` Linus Torvalds
2008-04-17 16:18 ` Linus Torvalds
2008-04-17 16:18 ` Linus Torvalds
[not found] ` <alpine.LFD.1.00.0804170916470.2879-5CScLwifNT1QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
2008-04-17 16:35 ` Peter Zijlstra
2008-04-17 16:35 ` Peter Zijlstra
2008-04-17 16:35 ` Peter Zijlstra
2008-04-17 16:40 ` Linus Torvalds
2008-04-17 16:40 ` Linus Torvalds
2008-04-17 16:40 ` Linus Torvalds
[not found] ` <alpine.LFD.1.00.0804170940270.2879-5CScLwifNT1QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
2008-04-17 17:23 ` Peter Zijlstra
2008-04-17 17:23 ` Peter Zijlstra
2008-04-17 17:23 ` Peter Zijlstra
2008-04-17 18:28 ` Linus Torvalds
2008-04-17 18:28 ` Linus Torvalds
2008-04-17 18:28 ` Linus Torvalds
[not found] ` <alpine.LFD.1.00.0804171127310.2879-5CScLwifNT1QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
2008-04-22 3:14 ` Nick Piggin
2008-04-22 3:14 ` Nick Piggin
2008-04-22 3:14 ` Nick Piggin
2008-04-18 6:31 ` Geert Uytterhoeven
2008-04-18 6:31 ` Geert Uytterhoeven
2008-04-18 6:31 ` Geert Uytterhoeven
2008-04-18 14:40 ` Linus Torvalds
2008-04-18 14:40 ` Linus Torvalds
2008-04-18 14:40 ` Linus Torvalds
2008-04-18 9:58 ` Jeremy Fitzhardinge
2008-04-18 9:58 ` Jeremy Fitzhardinge
2008-04-18 9:58 ` Jeremy Fitzhardinge
2008-04-21 12:00 ` Avi Kivity
2008-04-21 12:00 ` Avi Kivity
2008-04-21 12:00 ` Avi Kivity
[not found] ` <480C81C4.8030200-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-04-21 12:30 ` Peter Zijlstra
2008-04-21 12:30 ` Peter Zijlstra
2008-04-21 12:30 ` Peter Zijlstra
2008-04-21 13:26 ` Avi Kivity
2008-04-21 13:26 ` Avi Kivity
2008-04-21 13:26 ` Avi Kivity
[not found] ` <480C9619.2050201-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-04-21 14:35 ` Peter Zijlstra
2008-04-21 14:35 ` Peter Zijlstra
2008-04-21 14:35 ` Peter Zijlstra
2008-04-22 3:23 ` Nick Piggin
2008-04-22 3:23 ` Nick Piggin
2008-04-22 3:23 ` Nick Piggin
[not found] ` <20080422032319.GB21993-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-04-22 7:19 ` Avi Kivity [this message]
2008-04-22 7:19 ` Avi Kivity
2008-04-22 7:19 ` Avi Kivity
2008-04-22 8:07 ` Ingo Molnar
2008-04-22 8:07 ` Ingo Molnar
2008-04-22 8:07 ` Ingo Molnar
2008-04-22 9:42 ` Peter Zijlstra
2008-04-22 9:42 ` Peter Zijlstra
2008-04-22 9:42 ` Peter Zijlstra
2008-04-22 9:46 ` Nick Piggin
2008-04-22 9:46 ` Nick Piggin
2008-04-22 9:46 ` Nick Piggin
2008-05-14 18:33 ` Dave Kleikamp
2008-05-14 18:33 ` Dave Kleikamp
2008-05-15 1:13 ` Nick Piggin
2008-05-15 1:13 ` Nick Piggin
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