linux-kernel - Re: [GIT PULL] killable rwsems for v4.7

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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+55aFwvJOw7YSLq7TmUuD92NQy5MCqvn-UtmMnsnMKBB4zKcQ@mail.gmail.com>
Date:	Mon, 16 May 2016 13:32:28 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...nel.org>, Michal Hocko <mhocko@...nel.org>,
	Al Viro <viro@...iv.linux.org.uk>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] killable rwsems for v4.7

On Mon, May 16, 2016 at 7:55 AM, Ingo Molnar <mingo@...nel.org> wrote:
>
> This tree, by Michal Hocko, implements down_write_killable(). The main usecase
> will be to update mm_sem usage sites to use this new API,

Hmm. Is somebody (Michal?) looking at down_read_killable() too?

The VFS layer will want it with the pending parallel lookup code - the
inode semaphore is being converted to a rwsem, and there's a couple of
"killable" users.. The first step actually just wants to the exclusive
case (ie the write case that this adds), but I think the readdir code
could really use a reading version too..

                   Linus