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...scsi device struct is large, if the device is created on a busy system, kzalloc() might fail, so this patch does a fallback to vzalloc(). As vmalloc() adds overhead on data-path, add __GFP_REPEAT to kzalloc() flags to do this fallback only when really needed. Reported-by: Dan Aloni <alonid at stratoscale.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- I put this on my vhost fixes branch, intend to merge for 3.12. Dan, could you please confirm this works for you? drivers/vhost/scsi.c | 41 +++++++++++++++++++++++++++-------------- 1 file changed, 27 insertions(+), 14 delet...

...scsi device struct is large, if the device is created on a busy system, kzalloc() might fail, so this patch does a fallback to vzalloc(). As vmalloc() adds overhead on data-path, add __GFP_REPEAT to kzalloc() flags to do this fallback only when really needed. Reported-by: Dan Aloni <alonid at stratoscale.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- I put this on my vhost fixes branch, intend to merge for 3.12. Dan, could you please confirm this works for you? drivers/vhost/scsi.c | 41 +++++++++++++++++++++++++++-------------- 1 file changed, 27 insertions(+), 14 delet...

Tabs should not be doubly-escaped in regexp. Signed-off-by: Shahar Lev <shahar@stratoscale.com> --- v2v/convert_linux.ml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/v2v/convert_linux.ml b/v2v/convert_linux.ml index adbcaa2..1e9e689 100644 --- a/v2v/convert_linux.ml +++ b/v2v/convert_linux.ml @@ -581,7 +581,7 @@ let rec convert ~keep_serial_console (g : G.guest...

...iled once on my development machine. > > > > Saw it would be prudent to split the bulk of it, which is the vqs array > > into separately allocated parts. sizeof(struct vhost_virtqueue) is > > currently 16816 bytes. > > > > Signed-off-by: Dan Aloni <alonid at stratoscale.com> > > This extra indirection is likely to have measureable cost though. > > net core saw a similar problem, it was fixed in patch > net: allow large number of tx queues > > So let's do it in a similar way: try to allocate with > GFP_KERNEL | __GFP_NOWARN | _...

...iled once on my development machine. > > > > Saw it would be prudent to split the bulk of it, which is the vqs array > > into separately allocated parts. sizeof(struct vhost_virtqueue) is > > currently 16816 bytes. > > > > Signed-off-by: Dan Aloni <alonid at stratoscale.com> > > This extra indirection is likely to have measureable cost though. > > net core saw a similar problem, it was fixed in patch > net: allow large number of tx queues > > So let's do it in a similar way: try to allocate with > GFP_KERNEL | __GFP_NOWARN | _...

Hi, We all agree that it's not specific to virt-v2v. I managed to reproduce the same double fault on "normal" L2 boot - without libguestfs interference. And as Paolo wrote already, he will take a look at it. Thanks, Rom On Tue, Jan 21, 2014 at 3:05 PM, Richard W.M. Jones <rjones@redhat.com>wrote: > On Tue, Jan 21, 2014 at 04:38:30PM +0100, Kashyap Chamarthy wrote: >

...rge, if the device is > created on a busy system, kzalloc() might fail, so this patch does a > fallback to vzalloc(). > As vmalloc() adds overhead on data-path, add __GFP_REPEAT > to kzalloc() flags to do this fallback only when really needed. > Reported-by: Dan Aloni <alonid at stratoscale.com> > Signed-off-by: Michael S. Tsirkin <mst at redhat.com> > --- > I put this on my vhost fixes branch, intend to merge for 3.12. > Dan, could you please confirm this works for you? > drivers/vhost/scsi.c | 41 +++++++++++++++++++++++++++-------------- > 1 file cha...

Hey everybody, Any news about the topic? I could not find anything relevant yet. Thanks, Rom On Tue, Jan 21, 2014 at 3:34 PM, Rom Freiman <rom@stratoscale.com> wrote: > Hi, > > We all agree that it's not specific to virt-v2v. > > I managed to reproduce the same double fault on "normal" L2 boot - without > libguestfs interference. > And as Paolo wrote already, he will take a look at it. > > Thanks, > Rom...

...I write a big file to /tmp on L0 (till it 100% full) and then run a L2 VM. Almost every time it crushes with double fault. Debugging, debugging and more debugging. Marcelo/Paolo, if you have any clue, I would like to hear from you. Thanks, Rom On Fri, Jan 17, 2014 at 5:06 PM, Rom Freiman <rom@stratoscale.com> wrote: > Kashyap, just to be sure - it happens to you during the v2v > conversion? on L2? While L1 and L0 works fine afterwords, right? > > Thanks > > On Fri, Jan 17, 2014 at 4:45 PM, Kashyap Chamarthy <kchamart@redhat.com> wrote: >> On 01/17/2014 03:38 PM, Ric...

There is a bug which is still not fixed:Bug 956580 -[ RFE ]Support for VMware & Citrix OVF image import into RHEV https://bugzilla.redhat.com/show_bug.cgi?id=956580 Best regards, Tingting Zheng（郑婷婷） ----- Original Message ----- From: "Rom Freiman" <rom@stratoscale.com> To: libguestfs@redhat.com Sent: Wednesday, January 15, 2014 10:35:29 PM Subject: [Libguestfs] Double fault panic in L2 upon v2v conversion Hi everybody, Wanted to hear your opinion and to receive a smart advice. I'm trying to use virt-v2v in order to convert ova image (exported fro...

Hi everybody, Wanted to hear your opinion and to receive a smart advice. I'm trying to use virt-v2v in order to convert ova image (exported from vcenter) to run on libvirt/kvm - all this inside a VM of fedora. The converted image is also a fedora. During the conversion process, in some point of libguestfs activity, I get double fault panic from L2 (printed as part of libguest output) and the

Thanks Richard for a fast reply. Yes, indeed, im working on a nested environment. I try to run v2v inside a VM (L1) and to create an L2 by the conversion process. And on Intel. As I wrote, it fails once in few times, mainly when there is a memory pressure on L0. Kashyap, can you please share your experience? Why should it crash during nested conversion. I'm not too familiar with libguestfs

Kashyap, just to be sure - it happens to you during the v2v conversion? on L2? While L1 and L0 works fine afterwords, right? Thanks On Fri, Jan 17, 2014 at 4:45 PM, Kashyap Chamarthy <kchamart@redhat.com> wrote: > On 01/17/2014 03:38 PM, Richard W.M. Jones wrote: >> On Fri, Jan 17, 2014 at 04:14:03PM +0200, Rom Freiman wrote: >>> How do you know that the problem is with

Hi everybody, Wanted to hear your opinion and to receive a smart advice. I'm trying to use virt-v2v in order to convert ova image (exported from vmware) to run on libvirt/kvm - all this inside a VM of fedora. The converted image is also a fedora. During the conversion process, in some point of libguestfs activity, I get double fault panic from L2 (printed as part of libguest output) and the