Date: Wed, 25 Apr 2007 16:57:01 +0800 From: LI Xin <delphij@delphij.net> To: Oleg Derevenetz <oleg@vsi.ru> Cc: freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: How to report bugs (Re: 6.2-STABLE deadlock?) Message-ID: <462F17DD.5090001@delphij.net> In-Reply-To: <1177488860.462f0ddc6ce8c@webmail.vsi.ru> References: <20070313140848.GA89182@steerpike.hanley.stade.co.uk> <20070423025631.GA33256@steerpike.hanley.stade.co.uk> <20070423113912.GE2052@deviant.kiev.zoral.com.ua> <462DDB4D.8080507@delphij.net> <1177442585.462e5919c71f0@webmail.vsi.ru> <462EC294.3040001@delphij.net> <20070425035316.GB44054@xor.obsecurity.org> <1177488860.462f0ddc6ce8c@webmail.vsi.ru>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig91C5206A4D3B60FC2266D36C Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: quoted-printable Oleg Derevenetz wrote: [snip] > Not all people can do deadlock debugging, though. In my case turning on= =20 > INVARIANTS and WITNESS leads to unacceptable performance penalty due to= heavily=20 > loaded server. So I can only describe my case, actions and result witho= ut=20 > providing any debug information. I'd say that I completely agree with Kris because that it's very hard for developers to investigate problems if there is no detailed information available, especially for those problems that can not easily reproduced. Of course, deadlock debugging could be tricky, but having a backtrace can usually save a lot of time (and fortunately that is not that hard even for average users :) What I wanted to suggest is that, we hope that the submitter can provide detailed steps to reliably reproduce the problem whenever possible, if they are not able to diagnose the problem themselves, so we will be able to extract more information at lab, and possibly reach a fix. The problem I have is that the reporter of the issue is not quite cooperative as they did before, and what I wanted to say is that it's possible to trigger the livelock without nullfs/unionfs, and I did not figured out why (yet) because I can not reproduce it in my environment :-= ( Cheers, --=20 Xin LI <delphij@delphij.net> http://www.delphij.net/ FreeBSD - The Power to Serve! --------------enig91C5206A4D3B60FC2266D36C Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGLxfdOfuToMruuMARCpoeAJ9rD7+zIgWanFvtr5mOUPtno8X2+wCfYq9C jRhnVFxAIll9mOa7vWdSeBo= =O4w2 -----END PGP SIGNATURE----- --------------enig91C5206A4D3B60FC2266D36C--
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