From: Andrew Morton <akpm@osdl.org>
To: Jon Smirl <jonsmirl@yahoo.com>
Cc: linux-kernel@vger.kernel.org, keithp@keithp.com
Subject: Re: Is it possible to implement interrupt time printk's reliably?
Date: Thu, 6 May 2004 22:17:46 -0700 [thread overview]
Message-ID: <20040506221746.7bb45421.akpm@osdl.org> (raw)
In-Reply-To: <20040507025252.38914.qmail@web14929.mail.yahoo.com>
Jon Smirl <jonsmirl@yahoo.com> wrote:
>
> Problem:
> 1) Some operations on graphics cards cannot be stopped once they are started.
> It's not reasonable to turn interrupts off around these operations.
> 2) Kernel developers want console printk's to work from interrupt routines.
>
> How do you fix this situation?
Really you should use spin_lock_irqsave() on some driver-private lock
around the operation. Why is it not reasonable to disable irq's?
Duration, presumably?
If you're in process context you can use acquire_console_sem(), which will
serialise against printk.
next prev parent reply other threads:[~2004-05-07 5:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-07 2:52 Jon Smirl
2004-05-07 5:17 ` Andrew Morton [this message]
2004-05-07 13:34 ` Jon Smirl
2004-05-07 19:13 ` Andrew Morton
2004-05-07 19:26 ` Jon Smirl
2004-05-07 20:01 ` Andrew Morton
2004-05-09 16:33 ` Jon Smirl
2004-05-10 21:55 ` James Simmons
2004-05-10 22:22 ` Jon Smirl
2004-05-11 0:23 ` James Simmons
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040506221746.7bb45421.akpm@osdl.org \
--to=akpm@osdl.org \
--cc=jonsmirl@yahoo.com \
--cc=keithp@keithp.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®