From: "Randy.Dunlap" <rddunlap@osdl.org>
To: <akpm@osdl.org>
Cc: <davej@redhat.com>, <mpm@selenic.com>, <linux-kernel@vger.kernel.org>
Subject: Re: Debug: sleeping function called from invalid context
Date: Mon, 18 Aug 2003 20:24:23 -0700 (PDT) [thread overview]
Message-ID: <32789.4.4.25.4.1061263463.squirrel@www.osdl.org> (raw)
In-Reply-To: <20030818171545.5aa630a0.akpm@osdl.org>
> Dave Jones <davej@redhat.com> wrote:
>>
>> How spooky. now I got one too, (minus the noise).
>>
>> Call Trace:
>> [<c0120022>] __might_sleep+0x5b/0x5f
>
> It would be useful to know whether this was triggered by in_atomic() or by
> irqs_disabled(). We're suspecting the latter.
>
>
> diff -puN kernel/sched.c~might_sleep-diags kernel/sched.c
> --- 25/kernel/sched.c~might_sleep-diags Mon Aug 18 14:09:41 2003
> +++ 25-akpm/kernel/sched.c Mon Aug 18 14:11:55 2003
> @@ -2795,13 +2795,19 @@ void __might_sleep(char *file, int line)
> {
> #if defined(in_atomic)
> static unsigned long prev_jiffy; /* ratelimiting */
> + char *msg = NULL;
>
> - if (in_atomic() || irqs_disabled()) {
> + if (in_atomic())
> + msg = "in atomic section";
> + else if (irqs_disabled())
> + msg = "with interrupts disabled";
> +
> + if (msg) {
> if (time_before(jiffies, prev_jiffy + HZ))
> return;
> prev_jiffy = jiffies;
> - printk(KERN_ERR "Debug: sleeping function called from invalid"
> - " context at %s:%d\n", file, line);
> + printk(KERN_ERR "Debug: sleeping function "
> + "called %s at %s:%d\n", msg, file, line);
> dump_stack();
> }
> #endif
Took 5 tries of loading X to get it, and you got it.
(I'm using VGA_CONSOLE.)
Debug: sleeping function called with interrupts disabled at
include/asm/uaccess.h:473
Call Trace:
[<c0120d93>] __might_sleep+0x53/0x74
[<c010d001>] save_v86_state+0x71/0x1f0
[<c010dbd5>] handle_vm86_fault+0xc5/0xa90
[<c019cac8>] ext3_file_write+0x28/0xc0
[<c011cd96>] __change_page_attr+0x26/0x220
[<c010b310>] do_general_protection+0x0/0x90
[<c010a69d>] error_code+0x2d/0x40
[<c0109657>] syscall_call+0x7/0xb
~Randy
next prev parent reply other threads:[~2003-08-19 3:24 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-15 17:18 Debug: sleeping function called from invalid context Randy.Dunlap
2003-08-15 17:32 ` Dave Jones
2003-08-15 17:42 ` Randy.Dunlap
2003-08-15 19:30 ` Randy.Dunlap
2003-08-16 7:06 ` Matt Mackall
2003-08-18 21:07 ` Randy.Dunlap
2003-08-18 21:26 ` Matt Mackall
2003-08-19 0:13 ` Dave Jones
2003-08-19 0:15 ` Randy.Dunlap
2003-08-19 1:02 ` Zwane Mwaikambo
2003-08-19 0:15 ` Andrew Morton
2003-08-19 1:27 ` Matt Mackall
2003-08-19 3:24 ` Randy.Dunlap [this message]
2003-08-19 3:35 ` Andrew Morton
2003-08-19 3:39 ` Randy.Dunlap
2003-08-19 4:26 ` Matt Mackall
2003-08-19 4:29 ` Andrew Morton
2003-08-19 4:14 ` Matt Mackall
2003-08-19 5:14 ` Matt Mackall
2003-08-19 1:01 ` Matt Mackall
2003-08-19 1:04 ` Dave Jones
2003-08-19 1:09 ` Matt Mackall
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=32789.4.4.25.4.1061263463.squirrel@www.osdl.org \
--to=rddunlap@osdl.org \
--cc=akpm@osdl.org \
--cc=davej@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mpm@selenic.com \
/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;
as well as URLs for NNTP newsgroup(s).