Re: [Qemu-devel] kvm segfaulting

[Paolo Bonzini]

Il 13/02/2013 15:30, Stefan Priebe - Profihost AG ha scritto:
> I added this:
> -trace events=/tmp/events,file=/root/qemu.123.trace
> 
> and put the events in the events file as i couldn't handle \n in my app
> starting the kvm process. But even when doing an fstrim the trace file
> stays at 24 bytes - is this correct?

Right... it would eventually flush, but not if qemu-kvm crash.

Answering your other question, the patch subsumes the other.  But if the
provisioning mode is writesame_16, this hunk alone will most likely fix
the crash:

diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index d411586..4a0673c 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -178,6 +178,9 @@ static void scsi_aio_complete(void *opaque, int ret)
     assert(r->req.aiocb != NULL);
     r->req.aiocb = NULL;
     bdrv_acct_done(s->qdev.conf.bs, &r->acct);
+    if (r->req.io_canceled) {
+        goto done;
+    }

     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {

Paolo