linux-kernel - Re: [PATCH -v2 7/8] kexec jump: ftrace_enabled

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] [day] [month] [year] [list]

Message-Id: <1218504173.24951.7.camel@caritas-dev.intel.com>
Date:	Tue, 12 Aug 2008 09:22:53 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>, mingo@...e.hu,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Kexec Mailing List <kexec@...ts.infradead.org>
Subject: Re: [PATCH -v2 7/8] kexec jump: ftrace_enabled_save/restore

Hi, Vivek,

On Mon, 2008-08-11 at 09:51 -0400, Vivek Goyal wrote:
[...]
> So you want to use a non-locked version from optimization point of view?
> So that we don't end up taking and release a lock?

Not from optimization point of view. machine_kexec() may be called from
crash_kexec(), where it is not permitted to take and release a lock.

Best Regards,
Huang Ying


--
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/