From: Niklas Cassel <cassel@kernel.org>
To: Sam Li <faithilikerun@gmail.com>
Cc: qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>,
Kevin Wolf <kwolf@redhat.com>,
dlemoal@kernel.org, qemu-block@nongnu.org,
"Michael S. Tsirkin" <mst@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>,
Eric Blake <eblake@redhat.com>, Hanna Reitz <hreitz@redhat.com>
Subject: Re: [PATCH v13 4/6] virtio-blk: do not merge writes across a zone boundary
Date: Fri, 26 Jun 2026 15:38:59 +0200 [thread overview]
Message-ID: <aj6A86GgoeOePQGW@ryzen> (raw)
In-Reply-To: <20260626131555.459792-5-faithilikerun@gmail.com>
On Fri, Jun 26, 2026 at 03:15:53PM +0200, Sam Li wrote:
> virtio_blk_submit_multireq() fuses adjacent in-zone requests into a
> single request. On a zoned backend, a merged zone append request
> that straddles a zone boundary is rejected by the device because
> each write must stay within a single zone.
>
> Add a bail condition to the merge coalescer: if combining the
> candidate request into the current batch would cross a zone
> boundary, flush the current batch and start a new one.
>
> Signed-off-by: Sam Li <faithilikerun@gmail.com>
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
Reviewed-by: Niklas Cassel <cassel@kernel.org>
next prev parent reply other threads:[~2026-06-26 13:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-26 13:15 [PATCH v13 0/6] Add full zoned storage emulation to the qcow2 driver Sam Li
2026-06-26 13:15 ` [PATCH v13 1/6] docs/qcow2: add the zoned format feature Sam Li
2026-06-26 13:39 ` Niklas Cassel
2026-06-26 13:15 ` [PATCH v13 2/6] block: widen BlockLimits.zone_size to uint64_t Sam Li
2026-06-26 13:39 ` Niklas Cassel
2026-06-26 13:15 ` [PATCH v13 3/6] qcow2: add configurations for zoned format extension Sam Li
2026-06-26 13:15 ` [PATCH v13 4/6] virtio-blk: do not merge writes across a zone boundary Sam Li
2026-06-26 13:38 ` Niklas Cassel [this message]
2026-06-26 13:15 ` [PATCH v13 5/6] qcow2: add zoned emulation capability Sam Li
2026-06-26 13:15 ` [PATCH v13 6/6] iotests: test the zoned format feature for qcow2 file Sam Li
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