Date: Sat, 04 Oct 2003 01:38:13 -0400 From: Brian Fundakowski Feldman <green@FreeBSD.org> To: hackers@FreeBSD.org Subject: Is socket buffer locking as questionable as it seems? Message-ID: <200310040538.h945cDxp014188@green.bikeshed.org>
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I keep getting these panics on my SMP box (no backtrace or DDB or crash dump of course, because panic() == hang to FreeBSD these days): panic: receive: m == 0 so->so_rcv.sb_cc == 52 >From what I can tell, all sorts of socket-related calls are "MP-safe" and yet never even come close to locking the socket buffer. From what I can tell, the easiest way for this occur would be sbrelease() being called from somewhere that it's supposed to, but doesn't, have sblock(). Has anyone seen these, or a place to start looking? Maybe a way to get panics to stop hanging the machine? TIA if anyone has some enlightenment.
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