Date: Wed, 21 Feb 2001 21:31:55 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: cvs-all@FreeBSD.org Cc: cvs-committers@FreeBSD.org Subject: RE: cvs commit: src/sys/kern kern_intr.c src/sys/sys interrupt.h Message-ID: <XFMail.010221213155.jhb@FreeBSD.org> In-Reply-To: <200102220218.f1M2IX081475@freefall.freebsd.org>
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On 22-Feb-01 John Baldwin wrote: > jhb 2001/02/21 18:18:33 PST > > Modified files: > sys/kern kern_intr.c > sys/sys interrupt.h > Log: > Work around a race condition where an interrupt handler can be removed from > an interrupt thread while the interrupt thread is blocked on Giant waiting > to execute the interrupt handler being removed. The result was that the > intrhand structure would be free'd, and we would call 0xdeadc0de. The work > around is to check to see if the interrupt thread is idle when removing a > handler. If not, then we mark the interrupt handler as being dead using > the new IH_DEAD flag and don't remove it from the interrupt threads' list > of handlers. When the interrupt thread resumes, it will see a dead handler > while traversing the list of handlers and will remove the handler then. This should fix hte pccard insert/ejection panics. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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