Date: Wed, 28 Aug 2013 18:20:29 +0400 From: Dmitry Sivachenko <trtrmitya@gmail.com> To: stable@freebsd.org Subject: 9-STABLE panic on intensive fork Message-ID: <CC172316-C1A0-496A-ABEA-16A9516C3467@FreeBSD.org>
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Hello! I am using very recent FreeBSD-9-STABLE snapshot: 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #0 r254986: Wed Aug 28 17:18:57 = MSK 2013 I run uwsgi program (ports/www/uwsgi) on that machine. When uwsgi starts, it forks pre-configured number of worker processes. If I raise workers parameter high enough (128), I get kernel panic (100% = reproducible): Fatal trap 12: page fault while in kernel mode If I compile kernel with KDB enabled, I get the following stack: pmap_demote_pde_locked() pmap_copy() vmspace_fork() fork1() sys_fork() I have only remote console for that machine, so I made 2 screenshots: 1) http://people.freebsd.org/~demon/screen1.jpg Panic screen when kernel has no KDB support compiled in 2) http://people.freebsd.org/~demon/screen2.jpg Panic screen (2nd part) with the above stack shown. I can provide any additional information if needed. =20 Thanks!=
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