The commit is pushed to "branch-rh10-6.12.0-211.16.1.12.x.vz10-ovz" and will
appear at [email protected]:openvz/vzkernel.git
after rh10-6.12.0-211.16.1.12.4.vz10
------>
commit aea0a577cb1e67e9960da77b348b407571bde74f
Author: Andrey Zhadchenko <[email protected]>
Date: Fri Jun 19 16:33:07 2026 +0300
drivers/vhost/blk: fix uninitialized variable
Set ret to -EAGAIN. If we can't get backend, this means we are
in the proccess of shutting down or suspending. The request will
be read again from virtqueue some time later.
https://virtuozzo.atlassian.net/browse/VSTOR-134034
Signed-off-by: Andrey Zhadchenko <[email protected]>
======
Patchset description:
vhost-blk: handling of failing requests
This series mainly addresses the handling of failing requests.
Previously the driver will always retry all requests failed at
processing and will always complete the requests if they are
past bio submission point.
Using vhost-net and vhost-scsi as a model, we adopt the following
approach:
- requests failed at processing phase with ENOMEM/EAGAIN are re-tried
- requests failed at processing phase with other errors are not
reported completed and are not processed further. It is higly likely
they are just incorrect
- requests failed at status write after the completion are not
reported completed
This may sometime lead to guests stalling, but the alternatives are
always worse.
Also the patchset improves logging and adds a few sanity checks.
Feature: vhost-blk: in-kernel accelerator for virtio-blk guests
Reviewed-by: Pavel Tikhomirov <[email protected]>
---
drivers/vhost/blk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vhost/blk.c b/drivers/vhost/blk.c
index a3f01d55865a7..e4236df2f2161 100644
--- a/drivers/vhost/blk.c
+++ b/drivers/vhost/blk.c
@@ -406,7 +406,7 @@ static int vhost_blk_req_submit(struct vhost_blk_req *req)
{
struct block_device *bdev;
struct file *f;
- int ret;
+ int ret = -EAGAIN;
note_request(req);
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