pve-qemu-qoup/debian/patches/pve/0045-PVE-block-stream-increase-chunk-size.patch
Stefan Reiter 8dca018b68 udpate and rebase to QEMU v6.0.0
Mostly minor changes, bigger ones summarized:
* QEMU's internal backup code now uses a new async system, which allows
  parallel requests - the default max_workers settings is 64, I chose
  less, since 64 put enough stress on QEMU that the guest became
  practically unusable during the backup, and 16 still shows quite a
  nice measureable performance improvement. Little code changes for us
  though.
* 'malformed' QAPI parameters/functions are now a build error (i.e.
  using '_' vs '-'), I chose to just whitelist our calls in the name of
  backwards compatibility.
* monitor OOB race fix now uses the upstream variant, cherry-picked from
  origin/master since it's not in 6.0 by default
* last patch fixes a bug with snapshot rollback related to the new yank
  system

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
2021-05-28 11:29:44 +02:00

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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Stefan Reiter <s.reiter@proxmox.com>
Date: Tue, 2 Mar 2021 16:34:28 +0100
Subject: [PATCH] PVE: block/stream: increase chunk size
Ceph favors bigger chunks, so increase to 4M.
---
block/stream.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/stream.c b/block/stream.c
index 97bee482dc..50093c9f57 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -28,7 +28,7 @@ enum {
* large enough to process multiple clusters in a single call, so
* that populating contiguous regions of the image is efficient.
*/
- STREAM_CHUNK = 512 * 1024, /* in bytes */
+ STREAM_CHUNK = 4 * 1024 * 1024, /* in bytes */
};
typedef struct StreamBlockJob {