From: Thomas Lamprecht <t.lamprecht@proxmox.com>
To: pve-devel@lists.proxmox.com, Christian Ebner <c.ebner@proxmox.com>
Subject: Re: [PATCH v4 pve-qemu qemu-server 0/3] bypass host page cache for restore on zvol
Date: Sun, 23 Aug 2026 15:04:33 +0200 [thread overview]
Message-ID: <178749026798.3745671.6636752437746243191.b4-ty@b4> (raw)
In-Reply-To: <20260820131049.374072-1-c.ebner@proxmox.com>
On Thu, 20 Aug 2026 15:10:46 +0200, Christian Ebner wrote:
> This patch series skips writing to the host page cache for restores
> to zvols, with the intention to avoid potential I/O delay issues for
> other ZFS-backed VMs during page writeback on certain setups, as
> reported in enterprise support and reproduced internally.
>
> This patch series adds an optional no-cache parameter for pbs-restore
> command invocation, setting the BDRV_O_NOCACHE flag for the block
> device being restored to and sets `cache=none` for vma restores.
>
> [...]
Applied, with some minor fix-ups squashed in for qemu-server, thanks!
[pve-qemu] applied to git/pve-qemu (master)
[1/1] pbs-restore: add optional no-cache flag to bypass host page cache
commit: 21690c02e4e7a472b9d69caee77a941652c1dbdb
[qemu-server] applied to qemu-server.git (master)
[1/2] pbs-restore: set 'no-cache' on block devices backed by zfspool
https://git.proxmox.com/?p=qemu-server.git;a=commitdiff;h=c6b3237333b07794fb0c929b7fd02449af622452
[2/2] vma restore: skip page cache on block devices backed by zfspool
https://git.proxmox.com/?p=qemu-server.git;a=commitdiff;h=2abb892c4421922aaa27817eacc38c513b95e7aa
prev parent reply other threads:[~2026-08-23 13:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 13:10 [PATCH v4 pve-qemu qemu-server 0/3] bypass host page cache for restore on zvol Christian Ebner
2026-08-20 13:10 ` [PATCH v4 pve-qemu 1/3] pbs-restore: add optional no-cache flag to bypass host page cache Christian Ebner
2026-08-20 13:10 ` [PATCH v4 qemu-server 2/3] pbs-restore: set 'no-cache' on block devices backed by zfspool Christian Ebner
2026-08-21 7:44 ` Lukas Sichert
2026-08-20 13:10 ` [PATCH v4 qemu-server 3/3] vma restore: skip page cache " Christian Ebner
2026-08-23 13:04 ` Thomas Lamprecht [this message]
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