From: Anton Blanchard <anton@linuxcare.com.au>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Ralf Baechle <ralf@uni-koblenz.de>,
David Weinehall <tao@acc.umu.se>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linus Torvalds <torvalds@transmeta.com>,
Andrea Arcangeli <andrea@suse.de>,
David Woodhouse <dwmw2@infradead.org>,
Zlatko Calusic <zlatko@iskon.hr>,
Rik van Riel <riel@conectiva.com.br>,
linux-kernel@vger.kernel.org, linux-mm@frodo.biederman.org
Subject: Re: Caches, page coloring, virtual indexed caches, and more
Date: Mon, 15 Jan 2001 23:51:13 +1100 [thread overview]
Message-ID: <20010115235113.A31461@linuxcare.com> (raw)
In-Reply-To: <Pine.LNX.4.10.10101101100001.4457-100000@penguin.transmeta.com> <E14GR38-0000nM-00@the-village.bc.nu> <20010111005657.B2243@khan.acc.umu.se> <20010112035620.B1254@bacchus.dhis.org> <m17l40hhtd.fsf@frodo.biederman.org> <20010115005315.D1656@bacchus.dhis.org> <m1snmlfbrx.fsf_-_@frodo.biederman.org>
In-Reply-To: <m1snmlfbrx.fsf_-_@frodo.biederman.org>; from ebiederm@xmission.com on Mon, Jan 15, 2001 at 01:41:06AM -0700
Hi,
> shared mmap. This is the important one. Since we have a logical
> backing store this is easy to handle. We just enforce that the
> virtual address in a process that we mmap something to must match the
> logical address to VIRT_INDEX_BITS. The effect is the same as a
> larger page size with virtually no overhead.
Check out arch/sparc64/kernel/sys_sparc32.c. Dave and I fixed this a while
ago. In particular look at the arch specific SPARC_FLAG_MMAPSHARED flag.
> sysv shared memory is exactly the same as shared mmap. Except instead
> of a file offset you have an offset into the sysv segment.
sysv shared mem when you specify an attach address should work fine (ie
aligned to SHMLBA). On the other hand sysv shared mem without requesting
an address is broken and I havent got around to fixing it yet.
> mremap. Linux specific but pretty much the same as mmap, but easier.
> We just enforce that the virtual address of the source of mremap,
> and the destination of mremap match on VIRT_INDEX_BITS.
See above.
Cheers,
Anton
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
next prev parent reply other threads:[~2001-01-15 12:55 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-08 5:29 Subtle MM bug Wayne Whitney
2001-01-08 5:42 ` Andi Kleen
2001-01-08 6:04 ` Linus Torvalds
2001-01-08 17:44 ` Rik van Riel
2001-01-08 18:02 ` Linus Torvalds
2001-01-08 17:16 ` Rik van Riel
2001-01-08 17:58 ` Linus Torvalds
2001-01-08 23:41 ` Zlatko Calusic
2001-01-09 2:58 ` Linus Torvalds
2001-01-09 6:20 ` Eric W. Biederman
2001-01-09 7:27 ` Linus Torvalds
2001-01-09 11:38 ` Eric W. Biederman
2001-01-09 12:29 ` Zlatko Calusic
2001-01-09 18:47 ` Linus Torvalds
2001-01-09 19:09 ` Daniel Phillips
2001-01-09 19:29 ` Trond Myklebust
2001-01-10 17:32 ` Andi Kleen
2001-01-10 19:31 ` Alan Cox
2001-01-10 19:33 ` Andi Kleen
2001-01-10 19:40 ` Alan Cox
2001-01-10 19:43 ` Andi Kleen
2001-01-10 19:48 ` Alan Cox
2001-01-10 19:48 ` Andi Kleen
2001-01-11 9:51 ` Trond Myklebust
2001-01-10 20:11 ` Linus Torvalds
2001-01-11 12:56 ` Stephen C. Tweedie
2001-01-11 13:10 ` Andi Kleen
2001-01-11 13:12 ` Trond Myklebust
2001-01-11 14:13 ` Stephen C. Tweedie
2001-01-11 19:03 ` Alexander Viro
2001-01-11 19:47 ` Stephen C. Tweedie
2001-01-11 19:57 ` Alexander Viro
2001-01-11 16:50 ` Albert D. Cahalan
2001-01-11 17:35 ` Stephen C. Tweedie
2001-01-11 19:38 ` Albert D. Cahalan
2001-01-11 19:01 ` Alexander Viro
2001-01-09 19:37 ` Linus Torvalds
2001-01-17 8:46 ` Rik van Riel
2001-01-25 22:51 ` Daniel Phillips
2001-01-09 19:53 ` Simon Kirby
2001-01-09 20:08 ` Linus Torvalds
2001-01-09 20:10 ` Zlatko Calusic
2001-01-10 1:45 ` David Woodhouse
2001-01-10 2:26 ` Andrea Arcangeli
2001-01-10 6:57 ` Linus Torvalds
2001-01-10 11:46 ` David Woodhouse
2001-01-10 14:56 ` Andrea Arcangeli
2001-01-10 17:46 ` Eric W. Biederman
2001-01-10 18:33 ` Andrea Arcangeli
2001-01-17 14:26 ` Rik van Riel
2001-01-10 19:03 ` Linus Torvalds
2001-01-10 19:27 ` David S. Miller
2001-01-10 19:36 ` Alan Cox
2001-01-10 23:56 ` David Weinehall
2001-01-11 0:24 ` Alan Cox
2001-01-12 5:56 ` Ralf Baechle
2001-01-12 16:10 ` Eric W. Biederman
2001-01-12 21:11 ` Russell King
2001-01-15 2:56 ` Ralf Baechle
2001-01-15 6:59 ` Eric W. Biederman
2001-01-15 2:53 ` Ralf Baechle
2001-01-15 8:41 ` Caches, page coloring, virtual indexed caches, and more Eric W. Biederman
2001-01-15 11:54 ` Ralf Baechle
2001-01-15 12:53 ` Anton Blanchard
2001-01-15 17:41 ` Ralf Baechle
2001-01-17 4:36 ` Anton Blanchard
2001-01-16 9:34 ` Eric W. Biederman
2001-01-17 4:43 ` Anton Blanchard
2001-01-17 8:35 ` Eric W. Biederman
2001-01-15 17:16 ` Eric W. Biederman
2001-01-16 4:58 ` Ralf Baechle
2001-01-15 18:22 ` Jamie Lokier
2001-01-15 12:51 ` Anton Blanchard [this message]
2001-01-17 14:28 ` Subtle MM bug Rik van Riel
2001-01-18 1:23 ` Linus Torvalds
2001-01-18 11:48 ` Rik van Riel
2001-01-10 17:03 ` Linus Torvalds
2001-01-11 14:36 ` Jim Gettys
2001-01-08 21:30 ` Wayne Whitney
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=20010115235113.A31461@linuxcare.com \
--to=anton@linuxcare.com.au \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=andrea@suse.de \
--cc=dwmw2@infradead.org \
--cc=ebiederm@xmission.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@frodo.biederman.org \
--cc=ralf@uni-koblenz.de \
--cc=riel@conectiva.com.br \
--cc=tao@acc.umu.se \
--cc=torvalds@transmeta.com \
--cc=zlatko@iskon.hr \
/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