Re: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U1

[Adam Heath]

On Thu, 14 Oct 2004, Adam Heath wrote:

> On Thu, 14 Oct 2004, Ingo Molnar wrote:
>
> >
> > i have released the -U1 PREEMPT_REALTIME patch:
> >
> >   http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc4-mm1-U1
> >
> > Changes since -U0:
> >
> >  - bugfix: fixed the highmem related crash reported by Adam Heath and i
> >    think this could also fix the crash reported by Mark H Johnson.
>
> I've reenabled highmem(4g).
>
> Seems to be working fine.  Has been running 11 minutes, without problems.
>
> ps: Something that irks me.  During bootup, I get the high-latency traces for
>     swapper/0.  These fill up the dmesg ring buffer, so the early messages get
>     dropped.  Is there anything that can be done to fix that?

Got my first message.

scheduling while atomic: kswapd0/0x04000001/10
caller is cond_resched+0x53/0x70
 [<c027ad31>] schedule+0x531/0x570
 [<c027b2a3>] cond_resched+0x53/0x70
 [<c012c604>] _mutex_lock+0x14/0x40
 [<c0149521>] page_lock_anon_vma+0x31/0x60
 [<c0149725>] page_referenced_anon+0x15/0x80
 [<c01498ba>] page_referenced+0x7a/0x80
 [<c0141635>] refill_inactive_zone+0x435/0x4b0
 [<c01408a3>] shrink_slab+0x143/0x160
 [<c0141728>] shrink_zone+0x78/0xc0
 [<c0141b7a>] balance_pgdat+0x23a/0x2f0
 [<c0141ced>] kswapd+0xbd/0xf0
 [<c012c140>] autoremove_wake_function+0x0/0x50
 [<c01056d2>] ret_from_fork+0x6/0x14
 [<c012c140>] autoremove_wake_function+0x0/0x50
 [<c0141c30>] kswapd+0x0/0xf0
 [<c0103a2d>] kernel_thread_helper+0x5/0x18

Config is as before, with highmem enabled being the only difference.
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