debian/patches/pve/0008-PVE-Config-rbd-block-rbd-disable-rbd_cache_writethro.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: Wolfgang Bumiller <w.bumiller@proxmox.com>
   3 Date: Fri, 31 Aug 2018 09:32:55 +0200
   4 Subject: [PATCH] PVE: [Config] rbd: block: rbd: disable
   5  rbd_cache_writethrough_until_flush
   6
   7 Either the cache mode asks for a cache or not. There's no
   8 point in having a "temporary" cache mode. This option AFAIK
   9 was introduced as a hack for ancient virtio drivers. If
  10 anything, we should have a separate option for it. Better
  11 yet, VMs affected by the related issue should simply
  12 explicitly choose writethrough.
  13
  14 Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
  15 ---
  16  block/rbd.c | 2 ++
  17  1 file changed, 2 insertions(+)
  18
  19 diff --git a/block/rbd.c b/block/rbd.c
  20 index ca8e5bbace..34ae730711 100644
  21 --- a/block/rbd.c
  22 +++ b/block/rbd.c
  23 @@ -634,6 +634,8 @@ static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx,
  24          rados_conf_set(*cluster, "rbd_cache", "false");
  25      }
  26
  27 +    rados_conf_set(*cluster, "rbd_cache_writethrough_until_flush", "false");
  28 +
  29      r = rados_connect(*cluster);
  30      if (r < 0) {
  31          error_setg_errno(errp, -r, "error connecting");
  32 --
  33 2.11.0
  34