From: Pavel Machek <pavel@ucw.cz>
To: Eric B Munson <ebmunson@us.ibm.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, rolandd@cisco.com,
peterz@infradead.org, mingo@elte.hu
Subject: Re: [PATCH] ummunotify: Userspace support for MMU notifications
Date: Mon, 12 Apr 2010 22:20:48 +0200 [thread overview]
Message-ID: <20100412202047.GD2305@elf.ucw.cz> (raw)
In-Reply-To: <1271053337-7121-1-git-send-email-ebmunson@us.ibm.com>
Hi!
> I am resubmitting this patch because I believe that the discussion
> has shown this to be an acceptable solution. I have fixed the 32 bit
> build errors, but other than that change, the code is the same as
> Roland's V3 patch.
>
> From: Roland Dreier <rolandd@cisco.com>
>
> As discussed in <http://article.gmane.org/gmane.linux.drivers.openib/61925>
> and follow-up messages, libraries using RDMA would like to track
> precisely when application code changes memory mapping via free(),
> munmap(), etc. Current pure-userspace solutions using malloc hooks
> and other tricks are not robust, and the feeling among experts is that
> the issue is unfixable without kernel help.
I do not know. I still believe that this does not belong in the
kernel; application should not need to trace itself to know what it does.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2010-04-12 20:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-12 6:22 [PATCH] ummunotify: Userspace support for MMU notifications Eric B Munson
2010-04-12 20:20 ` Pavel Machek [this message]
2010-04-12 23:03 ` Andrew Morton
2010-04-12 23:59 ` Jason Gunthorpe
2010-04-13 8:29 ` Håkon Bugge
2010-04-13 17:57 ` Roland Dreier
2010-04-13 18:02 ` Peter Zijlstra
2010-04-14 5:18 ` Håkon Bugge
2010-04-14 8:52 ` Gleb Natapov
2010-04-15 13:48 ` Peter Zijlstra
2010-04-14 9:06 ` Gleb Natapov
2010-04-14 14:36 ` Jeff Squyres
2010-04-17 17:41 ` Eric B Munson
2010-04-14 16:43 ` [PATCH] ummunotify: fix umn-test build Randy Dunlap
2010-04-17 17:44 ` Eric B Munson
2010-04-18 14:38 ` Roland Dreier
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=20100412202047.GD2305@elf.ucw.cz \
--to=pavel@ucw.cz \
--cc=akpm@linux-foundation.org \
--cc=ebmunson@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=peterz@infradead.org \
--cc=rolandd@cisco.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).