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* -rt doesn't compile for UML
@ 2007-11-28 12:47 Miklos Szeredi
  2007-11-28 12:50 ` Ingo Molnar
  2007-11-28 15:06 ` Jeff Dike
  0 siblings, 2 replies; 34+ messages in thread
From: Miklos Szeredi @ 2007-11-28 12:47 UTC (permalink / raw)
  To: mingo; +Cc: jdike, user-mode-linux-devel, linux-kernel

When writing a big file to a ubd disk, everything in uml slows down to
a crawl, even though CPU usage is minimal.

So I wanted to try the latency tracer from -rt, but it doesn't compile
with UML:

  CC      arch/um/kernel/asm-offsets.s
In file included from arch/um/include/sysdep/kernel-offsets.h:2,
                 from arch/um/kernel/asm-offsets.c:1:
include/linux/sched.h: In function ‘set_tsk_need_resched_delayed’:
include/linux/sched.h:2105: error: ‘TIF_NEED_RESCHED_DELAYED’ undeclared (first use in this function)
include/linux/sched.h:2105: error: (Each undeclared identifier is reported only once
include/linux/sched.h:2105: error: for each function it appears in.)
include/linux/sched.h: In function ‘clear_tsk_need_resched_delayed’:
include/linux/sched.h:2110: error: ‘TIF_NEED_RESCHED_DELAYED’ undeclared (first use in this function)
include/linux/sched.h: In function ‘need_resched_delayed’:
include/linux/sched.h:2115: error: ‘TIF_NEED_RESCHED_DELAYED’ undeclared (first use in this function)
make[1]: *** [arch/um/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2

Ingo, do you think this route is worthwhile pursuing, or is it too
difficult to make -rt work for UML?

Thanks,
Miklos

^ permalink raw reply	[flat|nested] 34+ messages in thread

end of thread, other threads:[~2007-11-30 19:44 UTC | newest]

Thread overview: 34+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-11-28 12:47 -rt doesn't compile for UML Miklos Szeredi
2007-11-28 12:50 ` Ingo Molnar
2007-11-28 13:09   ` Miklos Szeredi
2007-11-28 13:15     ` Ingo Molnar
2007-11-28 13:15       ` Ingo Molnar
2007-11-28 13:24         ` Miklos Szeredi
2007-11-28 15:08     ` Jeff Dike
2007-11-28 15:38       ` Miklos Szeredi
2007-11-28 15:41         ` Ingo Molnar
2007-11-28 16:00           ` Miklos Szeredi
2007-11-28 16:05             ` Ingo Molnar
2007-11-28 16:57               ` Miklos Szeredi
2007-11-28 17:02                 ` Ingo Molnar
2007-11-28 17:02                 ` Miklos Szeredi
2007-11-28 17:24                   ` Ingo Molnar
2007-11-28 17:25                   ` Miklos Szeredi
2007-11-28 17:38         ` Jeff Dike
2007-11-28 15:06 ` Jeff Dike
2007-11-28 15:35   ` Miklos Szeredi
2007-11-28 18:29     ` Jeff Dike
2007-11-28 18:37       ` Ingo Molnar
2007-11-28 18:46       ` Miklos Szeredi
2007-11-29 10:19         ` scheduling anomaly on uml (was: -rt doesn't compile for UML) Miklos Szeredi
2007-11-29 10:57           ` Ingo Molnar
2007-11-29 11:36             ` Miklos Szeredi
2007-11-29 11:50               ` Ingo Molnar
2007-11-29 16:07             ` Miklos Szeredi
2007-11-29 16:25               ` Ingo Molnar
2007-11-29 18:05                 ` Miklos Szeredi
2007-11-29 19:26                   ` Ingo Molnar
2007-11-29 17:02           ` Jeff Dike
2007-11-29 17:16             ` Ingo Molnar
2007-11-29 17:58               ` Miklos Szeredi
2007-11-30 19:44             ` Miklos Szeredi

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