From: Jeff Dike <jdike@addtoit.com>
To: vincent-perrier <vincent-perrier@club-internet.fr>
Cc: Nix <nix@esperi.org.uk>, user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] actually useful backtrace from a CPU-chewing hang
Date: Wed, 14 May 2008 15:39:12 -0400 [thread overview]
Message-ID: <20080514193912.GA11531@c2.user-mode-linux.org> (raw)
In-Reply-To: <1210789757.25724.3.camel@localhost>
I finally reproduced this using 2.6.25.1 (2.6.25-mm1 was no good) with
your config.
The patch below fixes it for me. You'll notice a certain similarity
between this and a previous patch that you posted. It's not clear to
me why yours didn't work.
Jeff
--
Work email - jdike at linux dot intel dot com
Index: 2.6/stable/arch/um/os-Linux/time.c
===================================================================
--- 2.6.orig/stable/arch/um/os-Linux/time.c 2008-05-14 14:55:56.000000000 -0400
+++ 2.6/stable/arch/um/os-Linux/time.c 2008-05-14 15:30:48.000000000 -0400
@@ -66,12 +66,21 @@ long long disable_timer(void)
return timeval_to_ns(&time.it_value);
}
+static long long last_time;
+
long long os_nsecs(void)
{
struct timeval tv;
+ long long ret;
gettimeofday(&tv, NULL);
- return timeval_to_ns(&tv);
+ ret = timeval_to_ns(&tv);
+
+ if((last_time != 0) && (last_time > ret))
+ ret = last_time;
+
+ last_time = ret;
+ return ret;
}
#ifdef UML_CONFIG_NO_HZ
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next prev parent reply other threads:[~2008-05-14 19:39 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-25 19:59 [uml-devel] actually useful backtrace from a CPU-chewing hang Nix
2008-04-25 22:06 ` Nix
2008-04-26 18:31 ` Nix
2008-04-27 14:02 ` Nix
2008-04-28 16:44 ` Jeff Dike
2008-04-30 21:49 ` Nix
2008-05-01 15:13 ` Jeff Dike
2008-05-01 23:34 ` Nix
2008-05-02 16:30 ` Jeff Dike
2008-05-02 18:55 ` Nix
2008-05-02 19:57 ` Jeff Dike
2008-05-02 23:21 ` Nix
2008-05-03 0:56 ` Jeff Dike
2008-05-03 10:08 ` Nix
2008-05-09 15:16 ` Jeff Dike
2008-05-09 17:13 ` vincent-perrier
2008-05-09 20:32 ` Nix
2008-05-14 17:23 ` Jeff Dike
2008-05-14 18:03 ` vincent-perrier
2008-05-14 18:18 ` vincent-perrier
2008-05-14 18:29 ` vincent-perrier
2008-05-14 19:39 ` Jeff Dike [this message]
2008-05-14 20:12 ` Nix
2008-05-14 20:31 ` Nix
2008-05-14 20:43 ` Jeff Dike
2008-05-14 22:02 ` Nix
2008-05-19 18:54 ` [uml-devel] plug_and_play_clownix_network vincent-perrier
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