[pve-devel] applied: [PATCH v2 qemu-server] fix #4099: disable io_uring for virtual disks on CIFS storages
t.lamprecht at proxmox.com
Fri Oct 28 10:18:17 CEST 2022
On 27/10/2022 09:13, Fiona Ebner wrote:
> Since kernel 5.15, there is an issue with io_uring when used in
> combination with CIFS . Unfortunately, the kernel developers did
> not suggest any way to resolve the issue and didn't comment on my
> proposed one. So for now, just disable io_uring when the storage is
> CIFS, like is done for other storage types that had problematic
> It is rather easy to reproduce when writing large amounts of data
> within the VM. I used
> dd if=/dev/urandom of=file bs=1M count=1000
> to reproduce it consistently, but your mileage may vary.
> Some forum reports about users running into the issue .
> : https://www.spinics.net/lists/linux-cifs/msg26734.html
> : https://forum.proxmox.com/threads/109848/
> : https://forum.proxmox.com/threads/110464/
> : https://forum.proxmox.com/threads/111382/
> Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
> Changes from v1:
> * Add 'fix #4099'-prefix to commit title.
> PVE/QemuServer.pm | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
really unfortunate indeed though, a kernel fix would be nicer,
but there's only so much time we can spent waiting on progress
there, so ...
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