Date: Fri, 02 Mar 2007 11:45:13 -0700 From: Scott Long <scottl@samsco.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: cvs commit: src/sys/kern kern_intr.c Message-ID: <45E870B9.4040403@samsco.org> In-Reply-To: <200703021233.28346.jhb@freebsd.org> References: <200703021701.l22H1k3M071057@repoman.freebsd.org> <45E85B52.7000107@samsco.org> <20070302172817.GA29231@xor.obsecurity.org> <200703021233.28346.jhb@freebsd.org>
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John Baldwin wrote: > On Friday 02 March 2007 12:28, Kris Kennaway wrote: >> On Fri, Mar 02, 2007 at 10:13:54AM -0700, Scott Long wrote: >>> John Baldwin wrote: >>>> jhb 2007-03-02 17:01:45 UTC >>>> >>>> FreeBSD src repository >>>> >>>> Modified files: >>>> sys/kern kern_intr.c >>>> Log: >>>> - Don't do the interrupt storm protection stuff for software interrupt >>>> handlers. >>>> - Use pause() when throtting during an interrupt storm. >>>> >>>> Reported by: kris (1) >>>> >>>> Revision Changes Path >>>> 1.142 +3 -2 src/sys/kern/kern_intr.c >>> Actually, having this helped detect a problem with a CAM driver. >>> >>> Scott >> I saw it under normal operation when doing a lot of loopback traffic >> on an 8-core. > > Also, if it ever kicked in for softclock, the system would deadlock. > Can it be selectively enabled? Scott
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