Date: Fri, 11 Feb 2005 20:29:27 +0100 From: "Ralf S. Engelschall" <rse@FreeBSD.org> To: Vinod Kashyap <vkashyap@amcc.com> Cc: src-committers@freebsd.org Subject: Re: [FreeBSD-CVS] cvs commit: src/sys/dev/twa twa_cam.c twa_globals.c twa_ioctl.h Message-ID: <20050211192927.GA81946@engelschall.com> In-Reply-To: <IBRH1K02.I76@hadar.amcc.com> References: <IBRH1K02.I76@hadar.amcc.com>
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On Fri, Feb 11, 2005, Vinod Kashyap wrote: > > The same problem (3ware controller found, but device /dev/daX not > > discovered on booting and hence no root mount point) popped up for > > me yesterday under RELENG_5, too. The problem can be traced back to > > changes between 2005-02-03 (date of my old still working kernel) and > > 2005-02-10 (date of my new broken kernel). The whole diff to sys/ > > of RELENG_5 is about 350 KB (I used "cvs diff -jRELENG_5:2005-02-03 > > -jRELENG_5:2005-02-10") and I was at least able to reduce the > > origin of > > the problem to the appended 29 KB change set. > > > > With the latest RELENG_5 as of 2005-02-11 (today) but with > > this appended > > patch again backed out, the twa(4) problem is solved, too. Similarily, > > if I do not back out those changes and just use plain RELENG_5 as of > > 2005-02-11 with your patch above applied it is also solved. > > > > I guess your patch workarounds the problem, but the real origin of the > > problem is somewhere in the changes we can see in the appended patch. > > Unfortunately I do not understand the side-effects of those > > changes so I > > was not able to figure out myself which part of the change is actually > > causing the trouble for the twa(4) driver. > > > > Perhaps someone else can jump in and fix the origin of the problem... > > > > But the problem was first reported with RELENG_5 on Jan 12th, '05. > And I couldn't find any CAM related changes in the patch you sent. > The thing is, the occurrence of this seems to be pretty inconsistent. > I have never seen the problem myself at boot time, although I have > seen CAM not send down inquiries some times, on doing a kldload of > the driver (without my latest patch). Your change to CURRENT's twa_cam.c definitely fixes the problem just fine also under RELENG_5, so please MFC it soon. Thanks. -- rse@FreeBSD.org Ralf S. Engelschall FreeBSD.org/~rse rse@engelschall.com FreeBSD committer www.engelschall.com
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