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work around #3002: revert "qemu-img convert: Don't pre-zero images"

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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Thomas Lamprecht 2020-09-14 19:37:45 +02:00
parent 437d68473c
commit 7895b0d523
2 changed files with 34 additions and 0 deletions
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33
debian/patches/extra/0002-Revert-qemu-img-convert-Don-t-pre-zero-images.patch vendored Normal file
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@ -0,0 +1,33 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Thomas Lamprecht <t.lamprecht@proxmox.com>
Date: Mon, 14 Sep 2020 19:32:21 +0200
Subject: [PATCH] Revert "qemu-img convert: Don't pre-zero images"
This reverts commit edafc70c0c8510862f2f213a3acf7067113bcd08.
As it correlates with causing issues on LVM allocation
https://bugzilla.proxmox.com/show_bug.cgi?id=3002
---
qemu-img.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/qemu-img.c b/qemu-img.c
index 9635e9c001..c7884d248a 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2079,6 +2079,15 @@ static int convert_do_copy(ImgConvertState *s)
s->has_zero_init = bdrv_has_zero_init(blk_bs(s->target));
}
+ if (!s->has_zero_init && !s->target_has_backing &&
+ bdrv_can_write_zeroes_with_unmap(blk_bs(s->target)))
+ {
+ ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK);
+ if (ret == 0) {
+ s->has_zero_init = true;
+ }
+ }
+
/* Allocate buffer for copied data. For compressed images, only one cluster
* can be copied at a time. */
if (s->compressed) {

1
debian/patches/series vendored
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@ -1,4 +1,5 @@
extra/0001-block-block-copy-always-align-copied-region-to-clust.patch
extra/0002-Revert-qemu-img-convert-Don-t-pre-zero-images.patch
pve/0001-PVE-Config-block-file-change-locking-default-to-off.patch
pve/0002-PVE-Config-Adjust-network-script-path-to-etc-kvm.patch
pve/0003-PVE-Config-set-the-CPU-model-to-kvm64-32-instead-of-.patch