On Sun, May 03, 2009 at 10:16:11PM +0200, Stephane Glondu wrote: > Package: qemu > Version: 0.10.2-2 > Severity: important > > Hello, > > When using qemu-system-arm with qemubuilder, I keep getting the > following message in the guest system: > > > lsi_scsi: error: Unimplemented message 0x0c
This message are there because your disk accesses are slow, the kernel kills the current transfer, which causes the communication to be out of sync. This is not a regression from version 0.9.1-10. > Besides, disk access is incredibly slow. Such problems didn't exist > with the version in Lenny (0.9.1-10). I've tried with Linux kernels > 2.6.26-1-versatile and 2.6.29-1-versatile on the guest (I use the > regular Debian packages), with the same results. The cache policy has changed between qemu 0.9.1 and 0.10.x, in order to ensure data integrity in case the host crashes. You can change that by passing -drive file=...,cache=xxxxxx. writeback is the policy that was in qemu 0.9.x. The default one is writethrough, which can be slow, especially if you are using an encrypted filesystem for your host, or if they are other applications doing write activities. The later is even more true if you are using a kernel with the "fsync bug" (< 2.6.30). I'll add a note in NEWS.Debian.gz about this change, so that this bug can be closed. -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
