Messages in this thread Patch in this message | | | Date | Thu, 10 Jul 2008 15:08:41 -0300 | From | "Luiz Fernando N. Capitulino" <> | Subject | Re: [Bug #11035] System hangs on 2.6.26-rc8 |
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Em Thu, 10 Jul 2008 16:29:39 +0400 Roman Mindalev <lists@r000n.net> escreveu:
| Rafael J. Wysocki wrote: | > This message has been generated automatically as a part of a report | > of recent regressions. | > | > The following bug entry is on the current list of known regressions | > from 2.6.25. Please verify if it still should be listed. | > | > | > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11035 | > Subject : System hangs on 2.6.26-rc8 | > Submitter : Roman Mindalev <lists@r000n.net> | > Date : 2008-07-02 14:25 (5 days old) | > References : http://marc.info/?l=linux-kernel&m=121500871414995&w=4 | > | > | > | I have this problem with 2.6.25 too. | Unfortunately, I can't check 2.6.24. With config from 2.6.26-rc8 I got | error of compiling: | | LD .tmp_vmlinux1 | kernel/built-in.o: In function `timespec_add_ns': | /usr/src/kernels/linux-2.6.24/include/linux/time.h:179: undefined | reference to `__umoddi3'
[...]
You're trying to compile with gcc 4.3, right? You can try the attached fix or the following cherry-pick if you're compiling from a git tree:
$ git cherry-pick 38332cb98772f5ea757e6486bed7ed0381cb5f98
But I can't tell whether the compiler and/or the fix will change the behaivor of the bug you're reporting.
-- Luiz Fernando N. Capitulino commit 38332cb98772f5ea757e6486bed7ed0381cb5f98 Author: Segher Boessenkool <segher@kernel.crashing.org> Date: Tue Mar 4 14:59:54 2008 -0800
time: prevent the loop in timespec_add_ns() from being optimised away
Since some architectures don't support __udivdi3().
Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Cc: john stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/time.h b/include/linux/time.h index 2091a19..d32ef0a 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -174,6 +174,10 @@ static inline void timespec_add_ns(struct timespec *a, u64 ns) { ns += a->tv_nsec; while(unlikely(ns >= NSEC_PER_SEC)) { + /* The following asm() prevents the compiler from + * optimising this loop into a modulo operation. */ + asm("" : "+r"(ns)); + ns -= NSEC_PER_SEC; a->tv_sec++; } | |