bf251437e9
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>
27 lines
1013 B
Diff
27 lines
1013 B
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Fiona Ebner <f.ebner@proxmox.com>
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Date: Thu, 27 Apr 2023 10:28:08 +0200
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Subject: [PATCH] savevm-async: also initialize compression counters
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Like is done in the migration code. While the compression migration
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capability is not used by Proxmox VE currently, it's still worth to
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be prepared for the future.
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Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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---
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migration/savevm-async.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/migration/savevm-async.c b/migration/savevm-async.c
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index de91506821..effe6d1e0d 100644
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--- a/migration/savevm-async.c
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+++ b/migration/savevm-async.c
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@@ -394,6 +394,7 @@ void qmp_savevm_start(const char *statefile, Error **errp)
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*/
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migrate_init(ms);
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memset(&ram_counters, 0, sizeof(ram_counters));
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+ memset(&compression_counters, 0, sizeof(compression_counters));
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ms->to_dst_file = snap_state.file;
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error_setg(&snap_state.blocker, "block device is in use by savevm");
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