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kern/153672: i386/XEN panics under heavy fork load

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From: Colin Percival
Subject: kern/153672: i386/XEN panics under heavy fork load
Date: Tuesday, January 4, 2011 - 4:05 am

Running 'make index', i386/XEN frequently panics.  There are three
common backtraces:
  vmspace_fork -> pmap_copy -> pmap_qenter
  vmspace_fork -> pmap_copy -> pmap_zero_page
  vmspace_fork -> pmap_pinit -> pmap_qenter

Notably, in every vmcore I've examined, a different thread was inside
pmap_release, suggesting that there is a race happening between

Launch an EC2 instance running ami-f4db2a9d; portsnap fetch extract;
cd /usr/ports && make index.

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Previous thread: Re: bin/61355: login(1) does not restore terminal ownership on exit by Eugene Grosbein on Tuesday, January 4, 2011 - 2:40 am. (1 message)

Next thread: Re: kern/153672: i386/XEN panics under heavy fork load by cperciva on Tuesday, January 4, 2011 - 4:11 am. (1 message)