From: no-reply@sashiko.virtuozzo.com
To: svt-core@virtuozzo.com,
Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Subject: Re: [PATCH QEMU HCI-8.1 v5 02/36] migration/cpr-exec: restore RAM write access if exec fails
Date: Fri, 23 Oct 2026 16:58:20 +0000 [thread overview]
Message-ID: <010701a169b2ff33-241b0829-0f69-4256-9178-7f4415482393-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20261023-vfio_v1-v5-2-ba0bf3c6d122@virtuozzo.com>
> With -cpr-ram-rdonly the RAM blocks are made read-only right before
> execve(). If execve() fails, the VM resumes in the old QEMU with
> read-only RAM and crashes on the first write. Make it writable again.
>
> Fixes: 91da25f20471 ("migration/cpr-exec: add '-cpr-ram-rdonly' option to mark RAM blocks as RO #VSTOR-101579")
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261023-vfio_v1-v5-0-ba0bf3c6d122@virtuozzo.com?part=2
next prev parent reply other threads:[~2026-10-23 16:58 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 16:53 [PATCH QEMU HCI-8.1 v5 00/36] vfio: support qemu-update with passed through GPU's and vGPU's #VSTOR-103860 Andrey Drobyshev
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 01/36] VZ: migration/cpr-exec: fix Error leak in preserve_ram() Andrey Drobyshev
2026-10-23 16:58 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 02/36] migration/cpr-exec: restore RAM write access if exec fails Andrey Drobyshev
2026-10-23 16:58 ` no-reply [this message]
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 03/36] vfio/region: create BAR dma-bufs with O_CLOEXEC Andrey Drobyshev
2026-10-23 17:00 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 04/36] migration/cpr-exec: require a file or exec migration URI Andrey Drobyshev
2026-10-23 17:00 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 05/36] migration: close the CPR state if the outgoing channel fails to open Andrey Drobyshev
2026-10-23 17:01 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 06/36] migration/cpr-exec: close the persisted state if the " Andrey Drobyshev
2026-10-23 17:01 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 07/36] migration: don't refuse a blocker over a migration of another mode Andrey Drobyshev
2026-10-23 17:03 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 08/36] migration: Plug memory leaks after migrate_set_error() Andrey Drobyshev
2026-10-23 17:02 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 09/36] hw/vfio: Fix liveness check in vfio_connect_kvm_msi_virq() Andrey Drobyshev
2026-10-23 17:04 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 10/36] vfio/pci: Reject invalid MSI-X Table and PBA BIR values Andrey Drobyshev
2026-10-23 17:03 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 11/36] vfio/pci: Fix information leak in vfio_rom_read() Andrey Drobyshev
2026-10-23 17:04 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 12/36] vfio/pci: Initialize rom_read_failed in vfio_pci_load_rom() Andrey Drobyshev
2026-10-23 17:05 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 13/36] vfio/pci: Grow buffer in vfio_pci_host_match() Andrey Drobyshev
2026-10-23 17:05 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 14/36] q35: Fix migration of SMRAM state Andrey Drobyshev
2026-10-23 17:07 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 15/36] migration: ensure APIC is loaded prior to VFIO PCI devices Andrey Drobyshev
2026-10-23 17:06 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 16/36] migration: Fix regression of passing error_fatal into vmstate_load_state() Andrey Drobyshev
2026-10-23 17:09 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 17/36] migration: vmstate_save_state_v: fix double error_setg Andrey Drobyshev
2026-10-23 17:11 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 18/36] migration: yank: Move register instance earlier Andrey Drobyshev
2026-10-23 17:13 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 19/36] migration: Free cpr-transfer MigrationAddress along with gsource Andrey Drobyshev
2026-10-23 17:12 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 20/36] migration: Move CPR HUP watch to cpr-transfer.c Andrey Drobyshev
2026-10-23 17:12 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 21/36] migration: Fix crash on second migration when cancel early Andrey Drobyshev
2026-10-23 17:17 ` no-reply
2026-10-23 16:53 ` [PATCH QEMU HCI-8.1 v5 22/36] kvm: tolerate ioctls after kvm_close() Andrey Drobyshev
2026-10-23 17:17 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 23/36] kvm: fix coalesced MMIO flush racing with kvm_close() Andrey Drobyshev
2026-10-23 17:19 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 24/36] migration/cpr: add cpr_is_in_progress() Andrey Drobyshev
2026-10-23 17:19 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 25/36] vfio/migration: don't migrate device state during CPR Andrey Drobyshev
2026-10-23 17:26 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 26/36] vfio/migration: don't assume the device is running on CPR incoming Andrey Drobyshev
2026-10-23 17:23 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 27/36] vfio/listener: skip dirty page tracking during CPR Andrey Drobyshev
2026-10-23 17:27 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 28/36] VZ: vfio/cpr: don't close KVM on cpr-exec Andrey Drobyshev
2026-10-23 17:29 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 29/36] VZ: migration/cpr-exec: abort cpr-exec if memory can't be preserved Andrey Drobyshev
2026-10-23 17:29 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 30/36] VZ: migration/cpr-exec: take the vhost-net devices back if exec fails Andrey Drobyshev
2026-10-23 17:31 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 31/36] VZ: migration/cpr-exec: don't exec if a vhost-net device can't be released Andrey Drobyshev
2026-10-23 17:30 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 32/36] VZ: vfio/region: preserve BAR mappings across cpr-exec #VSTOR-103860 Andrey Drobyshev
2026-10-23 17:36 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 33/36] VZ: migration/cpr-exec: allow cpr-exec with VFIO devices #VSTOR-103860 Andrey Drobyshev
2026-10-23 17:32 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 34/36] VZ: vfio/container: lift the CPR blocker for mdev " Andrey Drobyshev
2026-10-23 17:34 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 35/36] VZ: migration: keep the estimate and wait over starved windows #VSTOR-150595 Andrey Drobyshev
2026-10-23 17:38 ` no-reply
2026-10-23 16:54 ` [PATCH QEMU HCI-8.1 v5 36/36] VZ: migration: don't wait for stop-copy-only device state #VSTOR-150595 Andrey Drobyshev
2026-10-23 17:40 ` no-reply
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