14ed554660
coming in via qemu-stable (except for the vdmk fix, which was tagged for-7.0 on the qemu-devel list, but didn't make it into the release). Also took the chance to switch the gluster fix to the version that made it into upstream. Signed-off-by: Fabian Ebner <f.ebner@proxmox.com> Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Date: Thu, 9 Jun 2022 17:47:11 +0100
|
|
Subject: [PATCH] linux-aio: fix unbalanced plugged counter in laio_io_unplug()
|
|
|
|
Every laio_io_plug() call has a matching laio_io_unplug() call. There is
|
|
a plugged counter that tracks the number of levels of plugging and
|
|
allows for nesting.
|
|
|
|
The plugged counter must reflect the balance between laio_io_plug() and
|
|
laio_io_unplug() calls accurately. Otherwise I/O stalls occur since
|
|
io_submit(2) calls are skipped while plugged.
|
|
|
|
Reported-by: Nikolay Tenev <nt@storpool.com>
|
|
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
|
|
Message-id: 20220609164712.1539045-2-stefanha@redhat.com
|
|
Cc: Stefano Garzarella <sgarzare@redhat.com>
|
|
Fixes: 68d7946648 ("linux-aio: add `dev_max_batch` parameter to laio_io_unplug()")
|
|
[Stefano Garzarella suggested adding a Fixes tag.
|
|
--Stefan]
|
|
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
(cherry-picked from commit f387cac5af030a58ac5a0dacf64cab5e5a4fe5c7)
|
|
Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
|
|
---
|
|
block/linux-aio.c | 4 +++-
|
|
1 file changed, 3 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/block/linux-aio.c b/block/linux-aio.c
|
|
index 4c423fcccf..6078da7e42 100644
|
|
--- a/block/linux-aio.c
|
|
+++ b/block/linux-aio.c
|
|
@@ -363,8 +363,10 @@ void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s,
|
|
uint64_t dev_max_batch)
|
|
{
|
|
assert(s->io_q.plugged);
|
|
+ s->io_q.plugged--;
|
|
+
|
|
if (s->io_q.in_queue >= laio_max_batch(s, dev_max_batch) ||
|
|
- (--s->io_q.plugged == 0 &&
|
|
+ (!s->io_q.plugged &&
|
|
!s->io_q.blocked && !QSIMPLEQ_EMPTY(&s->io_q.pending))) {
|
|
ioq_submit(s);
|
|
}
|