linux-kernel - Re: [PATCH v2 2/7] signal: retarget_shared_pending: consider shared/unblocked signals only

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20110422132238.4258cc8b@mfleming-mobl1.ger.corp.intel.com>
Date:	Fri, 22 Apr 2011 13:22:38 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Nikita V. Youshchenko" <nyoushchenko@...sta.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/7] signal: retarget_shared_pending: consider
 shared/unblocked signals only

On Mon, 18 Apr 2011 15:45:01 +0200
Oleg Nesterov <oleg@...hat.com> wrote:

> exit_signals() checks signal_pending() before retarget_shared_pending() but
> this is suboptimal. We can avoid the while_each_thread() loop in case when
> there are no shared signals visible to us.
> 
> Add the "shared_pending.signal & ~blocked" check. We don't use tsk->blocked
> directly but pass ~blocked as an argument, this is needed for the next patch.
> 
> Note: we can optimize this more. while_each_thread(t) can check t->blocked
> into account and stop after every pending signal has the new target, see the
> next patch.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Reviewed-by: Matt Fleming <matt.fleming@...ux.intel.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/