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>
virtiofsd is no longer part of QEMU 8.0. It got replaced by a separate
implementation written in Rust, which will be its own package.
See QEMU commit 0aaf44776e ("Merge tag 'pull-virtiofs-20230216b' of
https://gitlab.com/dagrh/qemu into staging").
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
We don't use it and with debhelper compat level >= 11, the switch
from detecting files for strip through patters to checking for an ELF
header caused a build failure with the hppa-firmware.img ROM, as some
tools cannot cope with HP PARISC files.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
this way we save a bit of space and should make build also slightly
faster, otherwise nothing should change.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This allows the sbuild to start much faster (lintian takes ~ minutes
for such big packages), and that without loss as sbuild will run
lintian on both binary and source package anyway.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
It causes problems when done as part of the clean target when building
the dsc with the following error due to the additional files:
dpkg-source: error: aborting due to unexpected upstream changes
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Copied from Debian's QEMU package's d/rules. Otherwise, ninja will end
up using only a single job (in Debian Bookworm/Proxmox VE 8).
Suggested-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
[ T: remove all tarballs for a package and any .deb ]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
When turning off the "KVM hardware virtualization" checkbox in Proxmox
VE, the TCG accelerator is used, so these fixes are relevant then.
The first patch is included to allow cherry-picking the others without
changes.
Reported-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Required for the debian/edk2-vars-generator.py script in the
pve-edk2-firmware repository when building the edk2-stable202302
release. Without this patch, the QEMU process spawned by the script
would hang indefinietly.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
The patch 0008-memory-prevent-dma-reentracy-issues.patch introduced a
regression for the LSI SCSI controller leading to boot failures [0],
because, in its current form, it relies on reentrancy for a particular
ram_io region.
[0]: https://forum.proxmox.com/threads/123843
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
The patches were selected from the recent "Patch Round-up for stable
7.2.1" [0]. Those that should be relevant for our supported use-cases
(and the upcoming nvme use-case) were picked. Most of the patches
added now have not been submitted to qemu-stable before.
The follow-up for the virtio-rng-pci migration fix will break
migration between versions with the fix and without the fix when a
virtio-pci-rng(-non)-transitional device is used. Luckily Proxmox VE
only uses the virtio-pci-rng device, and this was fixed by
0006-virtio-rng-pci-fix-migration-compat-for-vectors.patch which was
applied before any public version of Proxmox VE's QEMU 7.2 package was
released.
[0]: https://lists.nongnu.org/archive/html/qemu-stable/2023-03/msg00010.html
[1]: https://bugzilla.redhat.com/show_bug.cgi?id=2162569
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
The patch was incomplete and (re-)introduced an issue with a potential
failing assertion upon cancelation of the DMA request.
There is a patch on qemu-devel now[0], and it's the same as this one
code-wise (except for comments). But the discussion is still ongoing.
While there shouldn't be a real issue with the patch, there might be
better approaches. The plan is to use this as a stop-gap for now and
pick up the proper solution once it's ready.
[0]: https://lists.nongnu.org/archive/html/qemu-devel/2023-03/msg03325.html
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
In particular, the deadlock can occur, together with unlucky timing
between the QEMU threads, when the guest is issuing trim requests
during the start of a backup operation.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
[ T: resolve trivial merge conflict in series file ]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
In qemu-server, we already allocate 2 * $mem_size + 500 MiB for driver
state (which was 32 MiB long ago according to git history). It seems
likely that the 30 MiB cutoff in the savevm-async implementation was
chosen based on that.
In bug #4476 [0], another issue caused the iteration to not make any
progress and the state file filled up all the way to the 30 MiB +
pending_size cutoff. Since the guest is not stopped immediately after
the check, it can still dirty some RAM and the current cutoff is not
enough for a reproducer VM (was done while bug #4476 still was not
fixed), dirtying memory with
> stress-ng -B 2 --bigheap-growth 64.0M'
After entering the final stage, savevm actually filled up the state
file completely, leading to an I/O error. It's probably the same
scenario as reported in the bug report, the error message was fixed in
commit a020815 ("savevm-async: fix function name in error message")
after the bug report.
If not for the bug, the cutoff will only be reached by a VM that's
dirtying RAM faster than can be written to the storage, so increase
the cutoff to 100 MiB to have a bigger chance to finish successfully,
while still trying to not increase downtime too much for
non-hibernation snapshots.
[0]: https://bugzilla.proxmox.com/show_bug.cgi?id=4476
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
when pend_postcopy is large. By definition, pend_postcopy won't
decrease when iterating, so a value larger than the cutoff of 400000
would lead to essentially empty iterations, filling up the state file
until only 30 MiB + pending_size remain and the second half of the
check would trigger.
Avoid this, by not considering pend_postcopy for the cutoff to enter
the final phase.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
it ships files also shipped by our qemu package, switching from Debian qemu to
ours doesn't work without manual intervention otherwise..
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
