Date: Thu, 24 Oct 2002 17:12:19 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Dan Nelson <dnelson@allantgroup.com> Cc: Kirk McKusick <mckusick@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/fs/specfs spec_vnops.c src/sys/kern subr_disk.c src/sys/ufs/ffs ffs_snapshot.c Message-ID: <5892.1035472339@critter.freebsd.dk> In-Reply-To: Your message of "Thu, 24 Oct 2002 09:58:22 CDT." <20021024145822.GA69650@dan.emsphone.com>
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In message <20021024145822.GA69650@dan.emsphone.com>, Dan Nelson writes: >In the last episode (Oct 21), Kirk McKusick said: >> mckusick 2002/10/21 17:59:49 PDT >> >> Modified files: >> sys/fs/specfs spec_vnops.c >> sys/kern subr_disk.c >> sys/ufs/ffs ffs_snapshot.c >> Log: >> This checkin reimplements the io-request priority hack in a way >> that works in the new threaded kernel. It was commented out of > >I think this cure is worse than the disease. Background fsck times on >my system went from 10 minutes to an hour, and niced processes that >want to do any disk I/O at all run at a glacial speed. Try running >"nice find /" on an otherwise-idle system, for example. Don't bother >running anything at nice -20 :) I as somewhat afraid of this, and therefore floated the idea that the pacing should be moved all the way up to physio() so it only affected niced processes which access raw-devices, but Kirk thought hitting all disk-access was more logical. I can't really make up my mind either way. > Dan Nelson > dnelson@allantgroup.com Btw, I'm probably going to get a bounce from you because you deny all email from RIPE. RIPE covers all IP# in Europe, Middle-East and a lot of Africa. You might want to reconsider that policy, because otherwise you'll end up in my lameness filter :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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