From: Andrea Arcangeli <andrea@qumranet.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Robin Holt <holt@sgi.com>,
akpm@linux-foundation.org, Nick Piggin <npiggin@suse.de>,
Steve Wise <swise@opengridcomputing.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-mm@kvack.org, Kanoj Sarcar <kanojsarcar@yahoo.com>,
Roland Dreier <rdreier@cisco.com>, Jack Steiner <steiner@sgi.com>,
linux-kernel@vger.kernel.org, Avi Kivity <avi@qumranet.com>,
kvm-devel@lists.sourceforge.net, general@lists.openfabrics.org,
Hugh Dickins <hugh@veritas.com>
Subject: Re: [PATCH 1 of 9] Lock the entire mm to prevent any mmu related operation to happen
Date: Fri, 18 Apr 2008 00:16:55 +0200 [thread overview]
Message-ID: <20080417221655.GA9287@duo.random> (raw)
In-Reply-To: <Pine.LNX.4.64.0804171202420.23938@schroedinger.engr.sgi.com>
On Thu, Apr 17, 2008 at 12:10:52PM -0700, Christoph Lameter wrote:
> EMM was/is using a single linked list which allows atomic updates. Looked
> cleaner to me since doubly linked list must update two pointers.
Cleaner would be if it would provide an abstraction in list.h. The
important is the memory taken by the head for this usage.
> I have not seen docs on the locking so not sure why you use rcu
> operations here? Isnt the requirement to have either rmap locks or
> mmap_sem held enough to guarantee the consistency of the doubly linked list?
Yes, exactly, I'm not using rcu anymore.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-04-17 22:16 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-08 15:44 [PATCH 0 of 9] mmu notifier #v12 Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 1 of 9] Lock the entire mm to prevent any mmu related operation to happen Andrea Arcangeli
2008-04-16 16:33 ` Robin Holt
2008-04-16 18:35 ` Christoph Lameter
2008-04-16 19:02 ` Robin Holt
2008-04-16 19:15 ` Christoph Lameter
2008-04-17 11:14 ` Robin Holt
2008-04-17 15:51 ` Andrea Arcangeli
2008-04-17 16:36 ` Robin Holt
2008-04-17 17:14 ` Andrea Arcangeli
2008-04-17 17:25 ` Robin Holt
2008-04-17 19:10 ` Christoph Lameter
2008-04-17 22:16 ` Andrea Arcangeli [this message]
2008-04-22 5:06 ` Rusty Russell
2008-04-25 16:56 ` Andrea Arcangeli
2008-04-25 17:04 ` Andrea Arcangeli
2008-04-25 19:25 ` Robin Holt
2008-04-26 0:57 ` Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 2 of 9] Core of mmu notifiers Andrea Arcangeli
2008-04-08 16:26 ` Robin Holt
2008-04-08 17:05 ` Andrea Arcangeli
2008-04-14 19:57 ` Christoph Lameter
2008-04-14 19:59 ` Christoph Lameter
2008-04-08 15:44 ` [PATCH 3 of 9] Moves all mmu notifier methods outside the PT lock (first and not last Andrea Arcangeli
2008-04-14 19:57 ` Christoph Lameter
2008-04-08 15:44 ` [PATCH 4 of 9] Move the tlb flushing into free_pgtables. The conversion of the locks Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 5 of 9] The conversion to a rwsem allows callbacks during rmap traversal Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 6 of 9] We no longer abort unmapping in unmap vmas because we can reschedule while Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 7 of 9] Convert the anon_vma spinlock to a rw semaphore. This allows concurrent Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 8 of 9] XPMEM would have used sys_madvise() except that madvise_dontneed() Andrea Arcangeli
2008-04-08 15:44 ` [PATCH 9 of 9] This patch adds a lock ordering rule to avoid a potential deadlock when Andrea Arcangeli
2008-04-08 21:46 ` [PATCH 0 of 9] mmu notifier #v12 Avi Kivity
2008-04-08 22:06 ` Andrea Arcangeli
2008-04-09 13:17 ` Robin Holt
2008-04-09 14:44 ` Andrea Arcangeli
2008-04-09 18:55 ` Robin Holt
2008-04-22 7:20 ` Andrea Arcangeli
2008-04-22 12:00 ` Andrea Arcangeli
2008-04-22 13:01 ` Robin Holt
2008-04-22 13:21 ` Andrea Arcangeli
2008-04-22 13:36 ` Robin Holt
2008-04-22 13:48 ` Andrea Arcangeli
2008-04-22 15:26 ` Robin Holt
2008-04-14 23:09 ` Christoph Lameter
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=20080417221655.GA9287@duo.random \
--to=andrea@qumranet.com \
--cc=a.p.zijlstra@chello.nl \
--cc=akpm@linux-foundation.org \
--cc=avi@qumranet.com \
--cc=clameter@sgi.com \
--cc=general@lists.openfabrics.org \
--cc=holt@sgi.com \
--cc=hugh@veritas.com \
--cc=kanojsarcar@yahoo.com \
--cc=kvm-devel@lists.sourceforge.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=npiggin@suse.de \
--cc=rdreier@cisco.com \
--cc=steiner@sgi.com \
--cc=swise@opengridcomputing.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;
as well as URLs for NNTP newsgroup(s).