From: David Woodhouse <dwmw2@infradead.org>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Andrew Morton <akpm@osdl.org>,
torvalds@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] Kernel thread signal handling.
Date: Mon, 13 Oct 2003 12:29:12 +0100 [thread overview]
Message-ID: <1066044551.24015.455.camel@hades.cambridge.redhat.com> (raw)
In-Reply-To: <20031013120843.E19601@flint.arm.linux.org.uk>
On Mon, 2003-10-13 at 12:08 +0100, Russell King wrote:
> jffs2 is using signal handlers as a method of communicating from user
> space to kernel space. Maybe it should create some sysfs files.
> However, since there aren't any existing sysfs entities for jffs2 to
> attach these files to, this wouldn't seem to be reasonable.
To clarify -- the JFFS2 garbage collect thread is using SIGSTOP, SIGCONT
and SIGKILL from userspace to mean exactly what SIGSTOP, SIGCONT and
SIGKILL always mean in userspace.
Since it already has signal handling code, we also use SIGHUP for
wakeup, and userspace can send that too to trigger a single GC pass.
--
dwmw2
next prev parent reply other threads:[~2003-10-13 11:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-13 10:31 David Woodhouse
2003-10-13 11:02 ` Andrew Morton
2003-10-13 11:08 ` Russell King
2003-10-13 11:29 ` David Woodhouse [this message]
2003-10-13 11:21 ` David Woodhouse
2003-10-13 11:40 ` Andrew Morton
2003-10-13 11:55 ` David Woodhouse
2003-10-13 12:11 ` Andrew Morton
2003-10-13 12:30 ` David Woodhouse
2003-10-13 16:36 ` Linus Torvalds
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