2021-03-15 18:41:24 +03:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Stefan Reiter <s.reiter@proxmox.com>
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Date: Tue, 2 Mar 2021 16:34:28 +0100
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Subject: [PATCH] PVE: block/stream: increase chunk size
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Ceph favors bigger chunks, so increase to 4M.
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2022-01-13 12:34:33 +03:00
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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2021-03-15 18:41:24 +03:00
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---
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block/stream.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/block/stream.c b/block/stream.c
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2023-10-17 15:10:09 +03:00
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index e522bbdec5..afed72db55 100644
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2021-03-15 18:41:24 +03:00
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--- a/block/stream.c
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+++ b/block/stream.c
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update submodule and patches to QEMU 8.0.0
Many changes were necessary this time around:
* QAPI was changed to avoid redundant has_* variables, see commit
44ea9d9be3 ("qapi: Start to elide redundant has_FOO in generated C")
for details. This affected many QMP commands added by Proxmox too.
* Pending querying for migration got split into two functions, one to
estimate, one for exact value, see commit c8df4a7aef ("migration:
Split save_live_pending() into state_pending_*") for details. Relevant
for savevm-async and PBS dirty bitmap.
* Some block (driver) functions got converted to coroutines, so the
Proxmox block drivers needed to be adapted.
* Alloc track auto-detaching during PBS live restore got broken by
AioContext-related changes resulting in a deadlock. The current, hacky
method was replaced by a simpler one. Stefan apparently ran into a
problem with that when he wrote the driver, but there were
improvements in the stream job code since then and I didn't manage to
reproduce the issue. It's a separate patch "alloc-track: fix deadlock
during drop" for now, you can find the details there.
* Async snapshot-related changes:
- The pending querying got adapted to the above-mentioned split and
a patch is added to optimize it/make it more similar to what
upstream code does.
- Added initialization of the compression counters (for
future-proofing).
- It's necessary the hold the BQL (big QEMU lock = iothread mutex)
during the setup phase, because block layer functions are used there
and not doing so leads to racy, hard-to-debug crashes or hangs. It's
necessary to change some upstream code too for this, a version of
the patch "migration: for snapshots, hold the BQL during setup
callbacks" is intended to be upstreamed.
- Need to take the bdrv graph read lock before flushing.
* hmp_info_balloon was moved to a different file.
* Needed to include a new headers from time to time to still get the
correct functions.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
2023-05-15 16:39:53 +03:00
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@@ -27,7 +27,7 @@ enum {
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2021-03-15 18:41:24 +03:00
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* large enough to process multiple clusters in a single call, so
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* that populating contiguous regions of the image is efficient.
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*/
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- STREAM_CHUNK = 512 * 1024, /* in bytes */
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+ STREAM_CHUNK = 4 * 1024 * 1024, /* in bytes */
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};
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typedef struct StreamBlockJob {
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