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block: bugfix: Don't pause vm when NOSPACE EIO happened

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When backend disk is FULL and disk IO type is 'dataplane',
QEMU will pause the vm, and this may cause endless-loop in
QEMU main thread if we do the snapshot merge now.

When backend disk is FULL, only reporting an error rather
than pausing the virtual machine.

Signed-off-by: wangjian161 <wangjian161@huawei.com>
This commit is contained in:
Chen Qun 2022-02-09 16:10:22 +08:00 committed by yezengruan
parent 9285ceab91
commit f9ee5bf0c7
1 changed files with 33 additions and 0 deletions
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33
block-bugfix-Don-t-pause-vm-when-NOSPACE-EIO-happene.patch Normal file
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@ -0,0 +1,33 @@
From d0586db311e8b78732923ce46f149fdf8251a59c Mon Sep 17 00:00:00 2001
From: WangJian <wangjian161@huawei.com>
Date: Wed, 9 Feb 2022 16:10:22 +0800
Subject: [PATCH] block: bugfix: Don't pause vm when NOSPACE EIO happened
When backend disk is FULL and disk IO type is 'dataplane',
QEMU will pause the vm, and this may cause endless-loop in
QEMU main thread if we do the snapshot merge now.
When backend disk is FULL, only reporting an error rather
than pausing the virtual machine.
Signed-off-by: wangjian161 <wangjian161@huawei.com>
---
blockdev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/blockdev.c b/blockdev.c
index 37e3ee6f26..3ce294ec4a 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -556,7 +556,7 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
qdict_put_str(bs_opts, "driver", buf);
}
- on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
+ on_write_error = BLOCKDEV_ON_ERROR_REPORT;
if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
on_write_error = parse_block_error_action(buf, 0, &error);
if (error) {
--
2.27.0