From owner-freebsd-current Mon Dec 20 15:22:15 1999 Delivered-To: freebsd-current@freebsd.org Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by hub.freebsd.org (Postfix) with ESMTP id AFCB5153F7 for ; Mon, 20 Dec 1999 15:22:05 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id JAA06340; Tue, 21 Dec 1999 09:52:14 +1030 (CST) Date: Tue, 21 Dec 1999 09:52:14 +1030 From: Greg Lehey To: Matthew Dillon Cc: FreeBSD current users Subject: Re: Recent current hangs frequently for 1 to 2 seconds. Message-ID: <19991221095213.L440@freebie.lemis.com> References: <19991219143759.C465@freebie.lemis.com> <199912190416.UAA01125@apollo.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre2i In-Reply-To: <199912190416.UAA01125@apollo.backplane.com> WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Saturday, 18 December 1999 at 20:16:53 -0800, Matthew Dillon wrote: >> I've just upgraded to -CURRENT as of yesterday, and I'm noticing a >> number of occasions where all activity ceases for a second or two at a >> time; it seems to be related to IDE disk activity with the new ATA >> driver, but I don't have much evidence. I'm running a SiS 5591 >> chipset. Has anybody else seen something like this? > > It's possible that the blockages you are seeing are due to the ATA > driver, but it's also possible that they are due to a bug in the > buffer cache flushing code which the following patch fixes. So try > the patch and see if that fixes your problem. If it doesn't then > we can at least rule it out as being the cause of the problem you > are seeing. Thanks. I've put in the patch, but I'm still seeing the problems. It seems to be related to SCSI activity (I'm currently performing a backup on a DLT drive, and apart from that very little disk I/O). Any other ideas? It seems to me as if the whole system freezes (keystrokes don't echo, for example), so possibly something is going into splhigh for too long. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message