Date: Tue, 22 Dec 1998 12:58:58 +1030 From: Greg Lehey <grog@lemis.com> To: Mike Smith <mike@smith.net.au> Cc: current@FreeBSD.ORG Subject: Re: trap 12 with interrupts disabled Message-ID: <19981222125858.X85005@freebie.lemis.com> In-Reply-To: <199812220225.SAA02191@dingo.cdrom.com>; from Mike Smith on Mon, Dec 21, 1998 at 06:25:33PM -0800 References: <19981222125104.V85005@freebie.lemis.com> <199812220225.SAA02191@dingo.cdrom.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Monday, 21 December 1998 at 18:25:33 -0800, Mike Smith wrote: >>>>> pid 281 (Xaccel): trap 12 with interupts disabled >>>> >>>> Yes, I've noticed this one too. It seems to have crept in relatively >>>> recently, and strangely seems not to cause any problems. >>> >>> The diagnostic just warns of a bad situation (Xaccel has turned off >>> interrupts for some reason, and then pagefaulted), it doesn't mention >>> that it has in fact turned interrupts back on so that the pagefault can >>> be safely completed. >> >> If my page fault fails because I've blocked the interrupt, I'd expect >> some serious damage to happen to the process environment.n > > Usually you're lucky and something else turns them on unconditionally. > This test simply makes damn sure that if you take a fault interrupts > get turned back on. Ah. You mean we don't block the fault, just other interrupts? That makes more sense. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19981222125858.X85005>