0dc0c63dbf
- kvm-s390x-pci-add-support-for-guests-that-request-direct.patch [RHEL-11430] - kvm-s390x-pci-indicate-QEMU-supports-relaxed-translation.patch [RHEL-11430] - kvm-block-Expand-block-status-mode-from-bool-to-flags.patch [RHEL-82906 RHEL-83015] - kvm-file-posix-gluster-Handle-zero-block-status-hint-bet.patch [RHEL-82906 RHEL-83015] - kvm-block-Let-bdrv_co_is_zero_fast-consolidate-adjacent-.patch [RHEL-82906 RHEL-83015] - kvm-block-Add-new-bdrv_co_is_all_zeroes-function.patch [RHEL-82906 RHEL-83015] - kvm-iotests-Improve-iotest-194-to-mirror-data.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Minor-refactoring.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Pass-full-sync-mode-rather-than-bool-to-inter.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Allow-QMP-override-to-declare-target-already-.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Drop-redundant-zero_target-parameter.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Skip-pre-zeroing-destination-if-it-is-already.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Skip-writing-zeroes-when-target-is-already-ze.patch [RHEL-82906 RHEL-83015] - kvm-iotests-common.rc-add-disk_usage-function.patch [RHEL-82906 RHEL-83015] - kvm-tests-Add-iotest-mirror-sparse-for-recent-patches.patch [RHEL-82906 RHEL-83015] - kvm-mirror-Reduce-I-O-when-destination-is-detect-zeroes-.patch [RHEL-82906 RHEL-83015] - Resolves: RHEL-11430 ([IBM 9.7 FEAT] KVM: Performance Enhanced Refresh PCI Translation - qemu part) - Resolves: RHEL-82906 (--migrate-disks-detect-zeroes doesn't take effect for disk migration [rhel-9.7]) - Resolves: RHEL-83015 (Disk size of target raw image is full allocated when doing mirror with default discard value [rhel-9.7])
65 lines
2.3 KiB
Diff
65 lines
2.3 KiB
Diff
From 39e0c370357a414abacd64fb6a172e7b25eb4d82 Mon Sep 17 00:00:00 2001
|
|
From: Eric Blake <eblake@redhat.com>
|
|
Date: Fri, 9 May 2025 15:40:19 -0500
|
|
Subject: [PATCH 04/16] file-posix, gluster: Handle zero block status hint
|
|
better
|
|
|
|
RH-Author: Eric Blake <eblake@redhat.com>
|
|
RH-MergeRequest: 365: blockdev-mirror: More efficient handling of sparse mirrors
|
|
RH-Jira: RHEL-82906 RHEL-83015
|
|
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
|
|
RH-Commit: [2/14] 1f7b47ce5f5fb321aee41a16accf5bce3d1bfe95 (ebblake/centos-qemu-kvm)
|
|
|
|
Although the previous patch to change 'bool want_zero' into a bitmask
|
|
made no semantic change, it is now time to differentiate. When the
|
|
caller specifically wants to know what parts of the file read as zero,
|
|
we need to use lseek and actually reporting holes, rather than
|
|
short-circuiting and advertising full allocation.
|
|
|
|
This change will be utilized in later patches to let mirroring
|
|
optimize for the case when the destination already reads as zeroes.
|
|
|
|
Signed-off-by: Eric Blake <eblake@redhat.com>
|
|
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Message-ID: <20250509204341.3553601-17-eblake@redhat.com>
|
|
(cherry picked from commit a6a0a7fb0e327d17594c971b4a39de14e025b415)
|
|
Jira: https://issues.redhat.com/browse/RHEL-82906
|
|
Jira: https://issues.redhat.com/browse/RHEL-83015
|
|
Signed-off-by: Eric Blake <eblake@redhat.com>
|
|
---
|
|
block/file-posix.c | 3 ++-
|
|
block/gluster.c | 2 +-
|
|
2 files changed, 3 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/block/file-posix.c b/block/file-posix.c
|
|
index 9ca55620ca..ce5da2b4c2 100644
|
|
--- a/block/file-posix.c
|
|
+++ b/block/file-posix.c
|
|
@@ -3293,7 +3293,8 @@ static int coroutine_fn raw_co_block_status(BlockDriverState *bs,
|
|
return ret;
|
|
}
|
|
|
|
- if (mode != BDRV_WANT_PRECISE) {
|
|
+ if (!(mode & BDRV_WANT_ZERO)) {
|
|
+ /* There is no backing file - all bytes are allocated in this file. */
|
|
*pnum = bytes;
|
|
*map = offset;
|
|
*file = bs;
|
|
diff --git a/block/gluster.c b/block/gluster.c
|
|
index ae5c45666b..175c70164c 100644
|
|
--- a/block/gluster.c
|
|
+++ b/block/gluster.c
|
|
@@ -1483,7 +1483,7 @@ static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs,
|
|
return ret;
|
|
}
|
|
|
|
- if (mode != BDRV_WANT_PRECISE) {
|
|
+ if (!(mode & BDRV_WANT_ZERO)) {
|
|
*pnum = bytes;
|
|
*map = offset;
|
|
*file = bs;
|
|
--
|
|
2.48.1
|
|
|