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Re: Linux 2.6.25-rc7 sparc64 loops forever on cat /proc/<pid>/pagemap

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From: Mariusz Kozlowski <m.kozlowski@...>
To: Linus Torvalds <torvalds@...>
Cc: Linux Kernel Mailing List <linux-kernel@...>, David Miller <davem@...>, <sparclinux@...>
Subject: Re: Linux 2.6.25-rc7 sparc64 loops forever on cat /proc/&lt;pid&gt;/pagemap
Date: Wednesday, March 26, 2008 - 8:02 am

Hello,

cat /proc/<pid>/pagemap 

and 

cat /proc/<pid>/task/<pid>/pagemap

eats up to 100% of CPU while looping forever somewhere. On the other
hand on my old x86 the same commands take well below 1s so I
guess that is the expected behaviour.

PS. I'll be offline till tommorow just in case I was sent some patches to test.

	Mariusz
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Messages in current thread:
Linux 2.6.25-rc7, Linus Torvalds, (Tue Mar 25, 10:07 pm)
Re: Linux 2.6.25-rc7 sparc64 loops forever on cat /proc/<..., Mariusz Kozlowski, (Wed Mar 26, 8:02 am)
Re: Linux 2.6.25-rc7 sparc64 loops forever on cat /proc/&lt;..., David Miller, (Wed Mar 26, 8:35 pm)
Re: Linux 2.6.25-rc7 sparc64 loops forever on cat /proc/&lt;..., Mariusz Kozlowski, (Fri Mar 28, 7:33 am)
sparc64 BUG: using smp_processor_id() in preemptible, Mariusz Kozlowski, (Wed Mar 26, 6:42 am)
Re: sparc64 BUG: using smp_processor_id() in preemptible, David Miller, (Wed Mar 26, 7:16 am)
Re: sparc64 BUG: using smp_processor_id() in preemptible, David Miller, (Wed Mar 26, 7:25 am)
Re: sparc64 BUG: using smp_processor_id() in preemptible, Andrew Morton, (Wed Mar 26, 11:25 pm)
Re: sparc64 BUG: using smp_processor_id() in preemptible, David Miller, (Thu Mar 27, 2:33 am)
Re: sparc64 BUG: using smp_processor_id() in preemptible, Mariusz Kozlowski, (Wed Mar 26, 7:46 am)
Re: sparc64 BUG: using smp_processor_id() in preemptible, David Miller, (Wed Mar 26, 7:51 am)
Re: sparc64 BUG: using smp_processor_id() in preemptible, Mariusz Kozlowski, (Wed Mar 26, 8:10 am)