Date: Mon, 17 Mar 2003 15:41:27 -0800 From: Kirk McKusick <mckusick@beastie.mckusick.com> To: Jeff Roberson <jroberson@chesapeake.net> Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, dwmalone@FreeBSD.org, El Vampiro <vampiro@rootshell.ru>, "Evgueni V. Gavrilov" <aquatique@rusunix.org>, Mike Makonnen <mtm@identd.net>, src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: kern/42277 Message-ID: <200303172341.h2HNfRFL014201@beastie.mckusick.com> In-Reply-To: Your message of "Mon, 17 Mar 2003 16:22:05 EST." <20030317162051.R66343-100000@mail.chesapeake.net>
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Date: Mon, 17 Mar 2003 16:22:05 -0500 (EST) From: Jeff Roberson <jroberson@chesapeake.net> To: Poul-Henning Kamp <phk@phk.freebsd.dk> cc: Kirk McKusick <mckusick@mckusick.com>, <dwmalone@FreeBSD.org>, El Vampiro <vampiro@rootshell.ru>, "Evgueni V. Gavrilov" <aquatique@rusunix.org>, Mike Makonnen <mtm@identd.net>, <src-committers@FreeBSD.org>, <cvs-src@FreeBSD.org>, <cvs-all@FreeBSD.org> Subject: Re: kern/42277 X-ASK-Info: Whitelist match UMA has a facility to track the previous owner of the memory. Assuming that is the problem I could give you a way to cache this information so we can print it out when we detect corruption. I can work on this tonight. What is the repro? Cheers, Jeff I have not had any success in reproducing the problem on my machines, but I am mostly running on 5.X these days. Evgueni V. Gavrilov (copied on this message) seems to be able to produce the problem about once a day on his machines. He is also very willing to help out by testing patches and sending back reports. So, if you are able to provide him with a patch to collect the information, I am sure that he will run it and send back the results. He and I have already gone through all the 128-byte structures reported by `vmstat -m' looking for ones with a short at 64-bytes and found no viable candidates. So, I was feeling rather stuck. But it sounds like you have a viable way of tracking this down. Kirk McKusick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-src" in the body of the message
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