On Thu, 2012-06-21 at 01:28 -0700, Peter Cao wrote: > Hi Ben, > > > ----- Original Message ----- > From: "Ben Hutchings" <b...@decadent.org.uk> > To: "Peter Cao" <pengzhen...@vmware.com>, 678...@bugs.debian.org > Cc: "chunmei(Tracy) Huang" <cmhu...@vmware.com>, "Arvind Kumar" > <arku...@vmware.com> > Sent: Thursday, June 21, 2012 12:34:07 PM > Subject: Re: Bug#678236: linux-image-2.6.32-5-amd64: Disk IO error when > running debian 6.0.x with buslogic virtual disk and 4G+ mem in a VMware VM > > > >We offer both but the installer is supposed to pick the '686-bigmem' > >configuration by default. > > No. The installer picks amd64 kernel by default for configuration with 4G+ > mem. > And it normal "i686" kernel if mem<4G.
Oh, now I remember this bug: <http://bugs.debian.org/622622>. It only affected installation without a network mirror enabled, so far as I know. It was supposed to be fixed in point release 6.0.2, so I don't understand why you would still see it. > >It would not surprise me if BusLogic was broken on 64-bit systems, but > >presumably you would have noticed that in other 64-bit Linux guests. > >The userland architecture (i386 vs amd64) should not make any > >difference. > > This issue can not be repro on real amd64 debian(amd64 debian kernel+ amd64 > userland, installed with amd64 ISO). > And It can not be repro on ubuntu10.10 PAE kernel with 4G+ memory > > >What I meant is that if the VMware tools do not configure a Debian 6.0 > >guest to have a PV-SCSI adapter by default, this is a poor default and > >that is a bug (independent of any bugs in the guest kernel or driver). > > The default configuration will use lsilogic disk controller for debian. OK, so if the default works then this isn't such a disaster. > We do not use pvscsi disk controller by default for all guest OS. > I am not the owner for creating VM configurations but I guess this is a > balance for performance and best compatibility. > > >> We can use pvscsi for best performance but our customer may need the > >> buslogic virtual adapter so we have to support this configuration. > > >Why would they specifically need that when they use a guest and host > >that support PV-SCSI? > > We just support this configuration in our product and it is the user's choice > to use which controller. > PVSCSI should have best performance with vmware tools installed, but not > every user install tools, though we highly recommended end user to install > vmware tools for best IO/mem performance. > > Ben, do you have any suggestion on how to debug the buslogic driver? Sorry, I am not at all familiar with BusLogic or SCSI drivers in general. Ben. -- Ben Hutchings Every program is either trivial or else contains at least one bug
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