From: Christoph Hellwig <hch@infradead.org>
To: Ben Collins <bcollins@ubuntu.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Stefan Richter <stefanr@s5r6.in-berlin.de>,
"Serge E. Hallyn" <serue@us.ibm.com>,
weihs@ict.tuwien.ac.at, linux1394-devel@lists.sourceforge.net,
bcollins@debian.org, "Eric W. Biederman" <ebiederm@xmission.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] kthread conversion: convert ieee1394 from kernel_thread
Date: Sat, 10 Jun 2006 17:38:59 +0100 [thread overview]
Message-ID: <20060610163859.GA24081@infradead.org> (raw)
In-Reply-To: <1149957286.4448.542.camel@grayson>
On Sat, Jun 10, 2006 at 12:34:46PM -0400, Ben Collins wrote:
> 1394 bus rescanning takes a _lot_ longer than a PCI rescan. If we don't
> do this in a kthread, then we have to do it as a tasklet, and take a
> chance of stalling for a few seconds (not ms), preventing other
> tasklet's from running. Suboptimal, IMO.
This is just user-initiated FC rescans. And I doubt they take as long
as parallel scsi rescans which can go into the minutes range easily.
Nothing will be stalled by calling this except the caller, which would
usually be echo called from some shell, something the user can put in
the background using job control.
next prev parent reply other threads:[~2006-06-10 16:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-10 14:31 [PATCH] kthread conversion: convert ieee1394 from kernel_thread Serge E. Hallyn
2006-06-10 14:42 ` Christoph Hellwig
2006-06-10 15:11 ` Stefan Richter
2006-06-10 15:42 ` Christoph Hellwig
2006-06-10 16:34 ` Ben Collins
2006-06-10 16:38 ` Christoph Hellwig [this message]
2006-06-10 18:08 ` Ben Collins
2006-06-10 18:37 ` Christoph Hellwig
2006-06-17 18:44 ` Stefan Richter
2006-06-18 10:29 ` Stefan Richter
2006-06-18 16:57 ` [PATCH 2.6.17-rc6-mm2 0/6] ieee1394: nodemgr: misc API conversions Stefan Richter
2006-06-18 16:57 ` [PATCH 2.6.17-rc6-mm2 1/6] ieee1394: nodemgr: remove unnecessary includes Stefan Richter
2006-06-18 16:59 ` [PATCH 2.6.17-rc6-mm2 2/6] ieee1394: do not spawn a kernel_thread for user-initiated bus rescan Stefan Richter
2006-06-18 17:00 ` [PATCH 2.6.17-rc6-mm2 3/6] ieee1394: make module parameter ignore_drivers writable Stefan Richter
2006-06-18 17:02 ` [PATCH 2.6.17-rc6-mm2 4/6] ieee1394: nodemgr: switch to kthread API Stefan Richter
2006-06-18 17:03 ` [PATCH 2.6.17-rc6-mm2 5/6] ieee1394: nodemgr: replace reset semaphore Stefan Richter
2006-06-18 17:05 ` [PATCH 2.6.17-rc6-mm2 6/6] ieee1394: convert nodemgr_serialize semaphore to mutex Stefan Richter
2006-06-10 18:12 ` [PATCH] kthread conversion: convert ieee1394 from kernel_thread Stefan Richter
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