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fix #1071: use correct AioContext to cope with IOThreads

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Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
This commit is contained in:
Dietmar Maurer 2019-10-21 12:22:35 +02:00 committed by Thomas Lamprecht
parent 376d9ce806
commit 69cb18950a
2 changed files with 53 additions and 0 deletions
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52
debian/patches/pve/0032-PVE-bug-fix-1071-vma-writer.c-use-correct-AioContext.patch vendored Normal file
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@ -0,0 +1,52 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Mon, 21 Oct 2019 11:51:57 +0200
Subject: [PATCH] PVE bug fix #1071 - vma-writer.c: use correct AioContext
Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
---
vma-writer.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/vma-writer.c b/vma-writer.c
index fd9567634d..b163fa2d3a 100644
--- a/vma-writer.c
+++ b/vma-writer.c
@@ -199,12 +199,14 @@ int vma_writer_register_stream(VmaWriter *vmaw, const char *devname,
return n;
}
-static void vma_co_continue_write(void *opaque)
+static void coroutine_fn yield_until_fd_writable(int fd)
{
- VmaWriter *vmaw = opaque;
-
- DPRINTF("vma_co_continue_write\n");
- qemu_coroutine_enter(vmaw->co_writer);
+ assert(qemu_in_coroutine());
+ AioContext *ctx = qemu_get_current_aio_context();
+ aio_set_fd_handler(ctx, fd, false, NULL, (IOHandler *)qemu_coroutine_enter,
+ NULL, qemu_coroutine_self());
+ qemu_coroutine_yield();
+ aio_set_fd_handler(ctx, fd, false, NULL, NULL, NULL, NULL);
}
static ssize_t coroutine_fn
@@ -224,14 +226,12 @@ vma_queue_write(VmaWriter *vmaw, const void *buf, size_t bytes)
vmaw->co_writer = qemu_coroutine_self();
while (done < bytes) {
- aio_set_fd_handler(qemu_get_aio_context(), vmaw->fd, false, NULL, vma_co_continue_write, NULL, vmaw);
- qemu_coroutine_yield();
- aio_set_fd_handler(qemu_get_aio_context(), vmaw->fd, false, NULL, NULL, NULL, NULL);
if (vmaw->status < 0) {
DPRINTF("vma_queue_write detected canceled backup\n");
done = -1;
break;
}
+ yield_until_fd_writable(vmaw->fd);
ret = write(vmaw->fd, buf + done, bytes - done);
if (ret > 0) {
done += ret;
--
2.20.1

1
debian/patches/series vendored
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@ -34,3 +34,4 @@ pve/0028-docs-recommend-use-of-md-clear-feature-on-all-Intel-.patch
pve/0029-PVE-savevm-async-kick-AIO-wait-on-block-state-write.patch
pve/0030-PVE-move-snapshot-cleanup-into-bottom-half.patch
pve/0031-PVE-monitor-disable-oob-capability.patch
pve/0032-PVE-bug-fix-1071-vma-writer.c-use-correct-AioContext.patch