Date: Sat, 14 Dec 2002 17:01:14 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: "Brian F. Feldman" <green@FreeBSD.ORG> Cc: John Baldwin <jhb@FreeBSD.ORG>, Kris Kennaway <kris@obsecurity.org>, current@FreeBSD.ORG, alpha@FreeBSD.ORG Subject: Re: UMA panic under load Message-ID: <200212150101.gBF11ESx060117@apollo.backplane.com> References: <200212150037.gBF0bVSM014040@green.bikeshed.org>
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:The problem appears to be that swapout_procs() is swapping out a process
:that is in the process of exiting (in exit1()) and having already
:relinquished its vmspace, but has not set PRS_ZOMBIE yet (which would be
:preventing the swapout). It's clearly not correct for a process in exit1()
:to be swapped out, and the vmspace _needs_ to be decremented in the correct
:place or resources are NEVER freed when the race is lost.
:
:--
:Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\
: <> green@FreeBSD.org <> bfeldman@tislabs.com \ The Power to Serve! \
P_WEXIT is set before the vmspace is released. It may be sufficient
to have swapout_procs() ignore processes with P_WEXIT set.
-Matt
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