Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23

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To: Andrew Morton <akpm@...>

Cc: <rjw@...>, <linux-kernel@...>, <torvalds@...>, Stefano Brivio <stefano.brivio@...>, Guillaume Chazarain <guichaz@...>

Subject: Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23

Date: Monday, December 10, 2007 - 7:04 pm

* Ingo Molnar <mingo@elte.hu> wrote:

quoted text> * Andrew Morton <akpm@linux-foundation.org> wrote:
> 
> > > what do you think? Right now i've got them queued up for 2.6.25 in 
> > > both the scheduler-devel and the x86-devel git trees - but can 
> > > submit them for 2.6.24 if it's better if we did them there. I've got 
> > > no strong opinion either way.
> > 
> > printk_clock() doesn't seem terribly important but what's this stuff 
> > about effects on udelay/mdelay?  That can be serious if they're 
> > getting shortened.
> 
> since udelay depends on loops_per_jiffy, which is fixed up 
> time_cpufreq_notifier(), i dont see how it could be affected by 
> frequency changes. (but that's the theory - practice might be 
> different)

Stefano Brivio reported udelay()/mdelay() effects in the b43 driver. 
(and it caused driver failures for him.)

Stefano, could you please try to sum up your experiences with that 
issue? Is it reproducable, and the 5 patches i did fix it? (if yes, 
could you try to re-do the mdelay verifications perhaps, to make sure 
it's not some other effect interacting here. In theory sched-clock 
scaling has no effect on udelay behavior.)

	Ingo
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Messages in current thread:

2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Fri Dec 7, 10:40 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Mon Dec 10, 4:42 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Mon Dec 10, 4:59 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Mon Dec 10, 6:45 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Mon Dec 10, 7:04 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Stefano Brivio, (Mon Dec 10, 7:34 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Tue Dec 11, 5:01 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Stefano Brivio, (Tue Dec 11, 5:10 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Guillaume Chazarain, (Mon Dec 10, 7:53 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Tue Dec 11, 4:48 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Arjan van de Ven, (Mon Dec 10, 7:56 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Guillaume Chazarain, (Mon Dec 10, 8:01 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Arjan van de Ven, (Mon Dec 10, 9:06 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Tue Dec 11, 4:43 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Guillaume Chazarain, (Mon Dec 10, 4:57 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sun Dec 9, 7:54 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Sun Dec 9, 10:24 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Sun Dec 9, 8:05 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Fabio Comolli, (Sat Dec 8, 2:53 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Sat Dec 8, 4:28 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 5:23 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Sat Dec 8, 6:11 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sat Dec 8, 5:30 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Matt Mackall, (Sat Dec 8, 12:37 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Linus Torvalds, (Sat Dec 8, 1:47 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Christoph Lameter, (Thu Dec 13, 6:03 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Linus Torvalds, (Sat Dec 8, 1:54 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Pekka Enberg, (Sun Dec 9, 4:33 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Matt Mackall, (Sat Dec 8, 3:00 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Matt Mackall, (Sat Dec 8, 2:33 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Andrew Morton, (Sat Dec 8, 2:09 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sun Dec 9, 3:58 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Rafael J. Wysocki, (Sun Dec 9, 10:17 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Linus Torvalds, (Sat Dec 8, 2:37 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sat Dec 8, 3:52 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Christoph Lameter, (Fri Dec 14, 12:07 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Fri Dec 14, 8:49 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Eric Dumazet, (Fri Dec 14, 3:16 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Dave Jones, (Tue Dec 11, 2:27 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Tue Dec 11, 4:52 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Peter Zijlstra, (Tue Dec 11, 3:03 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sat Dec 8, 4:29 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Pekka Enberg, (Sun Dec 9, 4:20 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Arjan van de Ven, (Sun Dec 9, 11:59 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sun Dec 9, 4:50 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Christoph Lameter, (Thu Dec 13, 6:07 pm)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Pekka Enberg, (Sun Dec 9, 5:18 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sun Dec 9, 7:51 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Ingo Molnar, (Sun Dec 9, 8:34 am)

Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2..., Andrew Morton, (Sat Dec 8, 6:11 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 5:52 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Sun Dec 9, 3:00 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Cox, (Sun Dec 9, 9:42 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Linus Torvalds, (Sun Dec 9, 2:41 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Cox, (Sun Dec 9, 6:01 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Linus Torvalds, (Sun Dec 9, 9:57 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Mon Dec 10, 4:21 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Mon Dec 10, 4:27 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Mon Dec 10, 4:41 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Cox, (Sun Dec 9, 11:38 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Linus Torvalds, (Mon Dec 10, 11:38 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Cox, (Sun Dec 9, 11:28 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Linus Torvalds, (Sun Dec 9, 2:36 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Cox, (Sun Dec 9, 5:54 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Sun Dec 9, 11:09 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Cox, (Sun Dec 9, 11:25 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Sun Dec 9, 11:39 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 5:46 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Alan Stern, (Sat Dec 8, 11:49 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 5:42 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Roland Dreier, (Sat Dec 8, 2:57 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Theodore Tso, (Sat Dec 8, 3:40 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Sat Dec 8, 6:30 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Theodore Tso, (Sat Dec 8, 10:15 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Takashi Iwai, (Thu Dec 13, 6:49 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Takashi Iwai, (Thu Dec 20, 11:42 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Ingo Molnar, (Sat Dec 8, 3:55 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 5:36 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Sun Dec 9, 2:52 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Sun Dec 9, 10:20 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Sun Dec 9, 11:11 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andreas Mohr, (Sat Dec 8, 6:12 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 6:20 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andreas Mohr, (Sat Dec 8, 6:55 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Tejun Heo, (Sun Dec 9, 11:46 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andreas Mohr, (Sun Dec 9, 3:59 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Matthew Garrett, (Sat Dec 8, 6:28 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Andrew Morton, (Sat Dec 8, 5:29 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Sat Dec 8, 6:17 pm)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Richard Purdie, (Sat Dec 8, 6:44 am)

Re: 2.6.24-rc4-git5: Reported regressions from 2.6.23, Rafael J. Wysocki, (Sat Dec 8, 6:32 pm)

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