From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org, bcrl@redhat.com
Subject: Re: x86 ptep_get_and_clear question
Date: Fri, 16 Feb 2001 18:20:20 +0100 [thread overview]
Message-ID: <20010216182020.B4494@pcep-jamie.cern.ch> (raw)
In-Reply-To: <3A8C499A.E0370F63@colorfullife.com> <Pine.LNX.4.10.10102151702320.12656-100000@penguin.transmeta.com> <20010216151839.A3989@pcep-jamie.cern.ch> <3A8D4045.F8F27782@colorfullife.com> <20010216162741.A4284@pcep-jamie.cern.ch> <3A8D4D43.CF589FA0@colorfullife.com> <20010216170029.A4450@pcep-jamie.cern.ch> <3A8D540C.92C66398@colorfullife.com> <20010216174316.A4500@pcep-jamie.cern.ch> <3A8D5F6C.D81F2F28@colorfullife.com>
In-Reply-To: <3A8D5F6C.D81F2F28@colorfullife.com>; from manfred@colorfullife.com on Fri, Feb 16, 2001 at 06:12:12PM +0100
Manfred Spraul wrote:
> Ok, Is there one case were your pragmatic solutions is vastly faster?
> * mprotect: No. The difference is at most one additional locked
> instruction for each pte.
Oh, what instruction is that?
> * munmap(anon): No. We must handle delayed accessed anyway (don't call
> free_pages_ok() until flush_tlb_ipi returned). The difference is that we
> might have to perform a second pass to clear any spurious 0x40 bits.
That second pass is what I had in mind.
> * munmap(file): No. Second pass required for correct msync behaviour.
It is?
-- Jamie
next prev parent reply other threads:[~2001-02-16 17:20 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20010215173547.A2079@pcep-jamie.cern.ch>
[not found] ` <200102151723.JAA43255@google.engr.sgi.com>
2001-02-15 17:47 ` x86 ptep_get_and_clear question Jamie Lokier
2001-02-15 18:05 ` Kanoj Sarcar
2001-02-15 18:23 ` Kanoj Sarcar
2001-02-15 18:42 ` Jamie Lokier
2001-02-15 18:57 ` Kanoj Sarcar
2001-02-15 19:06 ` Ben LaHaise
2001-02-15 19:19 ` Kanoj Sarcar
2001-02-15 20:16 ` Linus Torvalds
2001-02-15 18:51 ` Manfred Spraul
2001-02-15 19:05 ` Kanoj Sarcar
2001-02-15 19:19 ` Jamie Lokier
2001-02-15 20:31 ` Linus Torvalds
2001-02-15 21:26 ` Manfred Spraul
2001-02-15 21:29 ` Manfred Spraul
2001-02-16 1:21 ` Linus Torvalds
2001-02-16 14:18 ` Jamie Lokier
2001-02-16 14:59 ` Manfred Spraul
2001-02-16 15:27 ` Jamie Lokier
2001-02-16 15:54 ` Manfred Spraul
2001-02-16 16:00 ` Jamie Lokier
2001-02-16 16:23 ` Manfred Spraul
2001-02-16 16:43 ` Jamie Lokier
2001-02-16 17:12 ` Manfred Spraul
2001-02-16 17:20 ` Jamie Lokier [this message]
2001-02-16 17:36 ` Linus Torvalds
2001-02-16 18:49 ` Manfred Spraul
2001-02-16 19:00 ` Linus Torvalds
2001-02-16 19:02 ` Ben LaHaise
2001-02-16 19:32 ` Linus Torvalds
2001-02-16 19:42 ` Ben LaHaise
2001-02-16 17:37 ` Jamie Lokier
2001-02-16 18:04 ` Manfred Spraul
2001-02-16 18:09 ` Jamie Lokier
2001-02-16 18:36 ` Hugh Dickins
2001-02-16 17:29 ` Ben LaHaise
2001-02-16 17:38 ` Linus Torvalds
2001-02-16 17:44 ` Ben LaHaise
2001-02-16 17:59 ` Linus Torvalds
2001-02-15 23:57 ` Jamie Lokier
2001-02-16 0:55 ` Linus Torvalds
2001-02-15 19:07 ` Jamie Lokier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20010216182020.B4494@pcep-jamie.cern.ch \
--to=lk@tantalophile.demon.co.uk \
--cc=bcrl@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=manfred@colorfullife.com \
--cc=torvalds@transmeta.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox