Date: Tue, 20 Jul 1999 09:35:41 +0930 From: Greg Lehey <grog@lemis.com> To: Julian Elischer <julian@whistle.com> Cc: tarkhil@asteroid.svib.ru, John Polstra <jdp@polstra.com>, current@FreeBSD.ORG, stable@FreeBSD.ORG Subject: Re: Soft-updates feedback Message-ID: <19990720093541.N72885@freebie.lemis.com> In-Reply-To: <37938972.1CFBAE39@whistle.com>; from Julian Elischer on Mon, Jul 19, 1999 at 01:24:18PM -0700 References: <199907030501.JAA31071@shuttle.svib.ru> <37938972.1CFBAE39@whistle.com>
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On Monday, 19 July 1999 at 13:24:18 -0700, Julian Elischer wrote: > Alex Povolotsky wrote: >> >> About a week ago, I've posted a message here and didn't got positive replies. >> >> The problem is: >> >> when I use soft-updates on IDE disks (disk on primary master, disk on >> secondary master, CD on primary slave), any active disk-using program >> (starting Netscape, starting EXMH) causes all other programs literally to stop >> for several seconds (well, 20-30 seconds is quite often!). Turning >> soft-updates off causes this nastiness to disappear, but also slows down >> disk-active processess. > > I saw this behaviour before.. > It was with an IDE disk drive running in PIO mode > > turning on DMA mode for the disk fixed it. > I have no idea as to what was goin wrong, however I > suggest that you try a kernel from -current as there has been a lot of > change in the areas that might cause this sort of thing. FWIW, there's something funny in the timing of the IDE driver, even in DMA mode. I find in Vinum that I don't get control back from the driver strategy routine until the request has completed. 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-stable" in the body of the message
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