linux-kernel - Re: [RFC][PATCH 3/8] mem_notify v5: introduce /dev/mem_notify new device (the core of this patch series)

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:	Thu, 24 Jan 2008 13:19:45 +0100
From:	"Daniel Spång" <daniel.spang@...il.com>
To:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	"Marcelo Tosatti" <marcelo@...ck.org>,
	"Rik van Riel" <riel@...hat.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Subject: Re: [RFC][PATCH 3/8] mem_notify v5: introduce /dev/mem_notify new device (the core of this patch series)

Hi KOSAKI,

On 1/24/08, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:
> +#define PROC_WAKEUP_GUARD  (10*HZ)
[...]
> +       timeout = info->last_proc_notify + PROC_WAKEUP_GUARD;

If only one or a few processes are using the system I think 10 seconds
is a little long time to wait before they get the notification again.
Can we decrease this value? Or make it configurable under /proc? Or
make it lower with fewer users? Something like:

timeout = info->last_proc_notify + min(mem_notify_users, PROC_WAKEUP_GUARD);

Cheers,
Daniel
--
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/