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* Tue Oct 08 2024 Jon Maloy <jmaloy@redhat.com> - 6.2.0-53.el8.1

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- kvm-block-move-bdrv_qiov_is_aligned-to-file-posix.patch [RHEL-60553]
- kvm-block-use-the-request-length-for-iov-alignment.patch [RHEL-60553]
- Resolves: RHEL-60553
  (Frequent VM pauses on OpenShift Virtualization with Portworx storage)
This commit is contained in:
Jon Maloy 2024-10-08 11:57:30 -04:00
parent d87047a329
commit 9d0e98c152
3 changed files with 163 additions and 1 deletions
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104
kvm-block-move-bdrv_qiov_is_aligned-to-file-posix.patch Normal file
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@ -0,0 +1,104 @@
From 636e32b4c570ddb20266b6672311174353644f0e Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Thu, 29 Sep 2022 13:05:22 -0700
Subject: [PATCH 1/2] block: move bdrv_qiov_is_aligned to file-posix
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 411: block: Fix iov_len check in bdrv_qiov_is_aligned()
RH-Jira: RHEL-60553
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [1/2] 682c1b81b42959d9d91e0f68cd70e9753e53a279
There is only user of bdrv_qiov_is_aligned(), so move the alignment
function to there and make it static.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Message-Id: <20220929200523.3218710-2-kbusch@meta.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit a7c5f67a78569f8c275ea4ea9962e9c79b9d03cb)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/file-posix.c | 20 ++++++++++++++++++++
block/io.c | 20 --------------------
include/block/block.h | 1 -
3 files changed, 20 insertions(+), 21 deletions(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index b283093e5b..b404e1544f 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2051,6 +2051,26 @@ static int coroutine_fn raw_thread_pool_submit(BlockDriverState *bs,
return thread_pool_submit_co(pool, func, arg);
}
+/*
+ * Check if all memory in this vector is sector aligned.
+ */
+static bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
+{
+ int i;
+ size_t alignment = bdrv_min_mem_align(bs);
+
+ for (i = 0; i < qiov->niov; i++) {
+ if ((uintptr_t) qiov->iov[i].iov_base % alignment) {
+ return false;
+ }
+ if (qiov->iov[i].iov_len % alignment) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov, int type)
{
diff --git a/block/io.c b/block/io.c
index 8ae57728a6..639e171eff 100644
--- a/block/io.c
+++ b/block/io.c
@@ -3375,26 +3375,6 @@ void *qemu_try_blockalign0(BlockDriverState *bs, size_t size)
return mem;
}
-/*
- * Check if all memory in this vector is sector aligned.
- */
-bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
-{
- int i;
- size_t alignment = bdrv_min_mem_align(bs);
-
- for (i = 0; i < qiov->niov; i++) {
- if ((uintptr_t) qiov->iov[i].iov_base % alignment) {
- return false;
- }
- if (qiov->iov[i].iov_len % alignment) {
- return false;
- }
- }
-
- return true;
-}
-
void bdrv_io_plug(BlockDriverState *bs)
{
BdrvChild *child;
diff --git a/include/block/block.h b/include/block/block.h
index f885f113ef..09b374b496 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -622,7 +622,6 @@ void *qemu_blockalign(BlockDriverState *bs, size_t size);
void *qemu_blockalign0(BlockDriverState *bs, size_t size);
void *qemu_try_blockalign(BlockDriverState *bs, size_t size);
void *qemu_try_blockalign0(BlockDriverState *bs, size_t size);
-bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
void bdrv_enable_copy_on_read(BlockDriverState *bs);
void bdrv_disable_copy_on_read(BlockDriverState *bs);
--
2.45.2

48
kvm-block-use-the-request-length-for-iov-alignment.patch Normal file
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@ -0,0 +1,48 @@
From 9009b674a01dc0cd92c319c87714b5aca6e639f8 Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Thu, 29 Sep 2022 13:05:23 -0700
Subject: [PATCH 2/2] block: use the request length for iov alignment
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 411: block: Fix iov_len check in bdrv_qiov_is_aligned()
RH-Jira: RHEL-60553
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [2/2] 0e01d51cfb21ca43283626c2367e5c5d0d531736
An iov length needs to be aligned to the logical block size, which may
be larger than the memory alignment.
Tested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Message-Id: <20220929200523.3218710-3-kbusch@meta.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 25474d90aa50bd32e0de395a33d8de42dd6f2aef)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/file-posix.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index b404e1544f..b84c5725cc 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2058,12 +2058,13 @@ static bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
{
int i;
size_t alignment = bdrv_min_mem_align(bs);
+ size_t len = bs->bl.request_alignment;
for (i = 0; i < qiov->niov; i++) {
if ((uintptr_t) qiov->iov[i].iov_base % alignment) {
return false;
}
- if (qiov->iov[i].iov_len % alignment) {
+ if (qiov->iov[i].iov_len % len) {
return false;
}
}
--
2.45.2

12
qemu-kvm.spec
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@ -83,7 +83,7 @@ Obsoletes: %1-rhev <= %{epoch}:%{version}-%{release}
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 6.2.0
Release: 53%{?rcrel}%{?dist}
Release: 53%{?rcrel}%{?dist}.1
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
Epoch: 15
License: GPLv2 and GPLv2+ and CC-BY
@ -885,6 +885,10 @@ Patch361: kvm-nbd-server-Favor-qemu_aio_context-over-iohandler-con.patch
Patch362: kvm-iotests-test-NBD-TLS-iothread.patch
# For RHEL-52611 - CVE-2024-7409 virt:rhel/qemu-kvm: Denial of Service via Improper Synchronization in QEMU NBD Server During Socket Closure [rhel-8.10.z]
Patch363: kvm-nbd-server-CVE-2024-7409-Avoid-use-after-free-when-c.patch
# For RHEL-60553 - Frequent VM pauses on OpenShift Virtualization with Portworx storage
Patch364: kvm-block-move-bdrv_qiov_is_aligned-to-file-posix.patch
# For RHEL-60553 - Frequent VM pauses on OpenShift Virtualization with Portworx storage
Patch365: kvm-block-use-the-request-length-for-iov-alignment.patch
BuildRequires: wget
BuildRequires: rpm-build
@ -2054,6 +2058,12 @@ sh %{_sysconfdir}/sysconfig/modules/kvm.modules &> /dev/null || :
%changelog
* Tue Oct 08 2024 Jon Maloy <jmaloy@redhat.com> - 6.2.0-53.el8.1
- kvm-block-move-bdrv_qiov_is_aligned-to-file-posix.patch [RHEL-60553]
- kvm-block-use-the-request-length-for-iov-alignment.patch [RHEL-60553]
- Resolves: RHEL-60553
(Frequent VM pauses on OpenShift Virtualization with Portworx storage)
* Thu Sep 05 2024 Miroslav Rezanina <mrezanin@redhat.com> - 6.2.0-53.el8
- kvm-nbd-server-Favor-qemu_aio_context-over-iohandler-con.patch [RHEL-52611]
- kvm-iotests-test-NBD-TLS-iothread.patch [RHEL-52611]