lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 10 Nov 2009 13:00:16 -0500
From: Timo Sirainen <tss@....fi>
To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Oleg Nesterov <oleg@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Bryan Donlan <bdonlan@...il.com>,
Ulrich Drepper <drepper@...hat.com>,
WANG Cong <xiyou.wangcong@...il.com>,
linux-kernel@...r.kernel.org
Subject: Re: + prctl-add-pr_set_proctitle_area-option.patch added to -mm
tree
On Wed, 2009-11-11 at 02:48 +0900, KOSAKI Motohiro wrote:
> There is unwritten reason. I hope to add /proc/[pid]/cmdline cache. It
> help to avoid
> ps getting stuck by mmap_sem.
Can you explain this further? When would it cache the value and when
would it be returned? I was at least hoping to avoid calling prctl()
every time when I want process title changed.
I think Solaris saves the first 80 chars of the initial cmdline to
kernel memory and gives that to ps. I guess doing something similar and
returning it only when userspace memory can't be accessed would be ok.
Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)
Powered by blists - more mailing lists