linux-kernel - Re: [PATCH 0/4] munmap: Flexible mem unmap operation interface for scheduling latency

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]

Date:	Tue, 26 Apr 2011 09:25:20 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Geunsik Lim <leemgs1@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Hugh Dickins <hughd@...gle.com>,
	Darren Hart <dvhart@...ux.intel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH 0/4] munmap: Flexible mem unmap operation interface for
 scheduling latency

On Mon, 2011-04-25 at 16:29 -0400, Steven Rostedt wrote:
> On Mon, 2011-04-25 at 21:47 +0200, Peter Zijlstra wrote:
> 
> > Also, -rt doesn't care since it already has preemptible mmu_gather.
> 
> To be fair, he did state:
> 
> >     In general, This is not a critical latency-path on preemption mode
> >     (PREEMPT_VOLUNTARY / PREEMPT_DESKTOP / PREEMPT_RT)

That doesn't parse for me... what does it say? The only one not listed
is the non-preempt option, that wouldn't reschedule no matter what
ZAP_BLOCK_SIZE.
--
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/