From: no-reply@sashiko.virtuozzo.com
To: svt-core@virtuozzo.com,
Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Cc: andrey.drobyshev@virtuozzo.com, den@openvz.org
Subject: Re: [PATCH QEMU HCI-8.0 v8 11/14] usb: migrate the interface altsetting #VSTOR-137800
Date: Tue, 6 Oct 2026 16:46:27 +0000 [thread overview]
Message-ID: <010701a1121c016c-5a85ea81-50bb-4a62-8c7b-15cdc4bdbc6f-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20261006-usb-host_v3-v8-11-72ae4fb8977b@virtuozzo.com>
> The active altsetting of each interface is host controller state that
> the guest selected with SET_INTERFACE, but it isn't part of the
> migration stream. For most devices the target happens to reopen on the
> same altsettings, so this went unnoticed.
>
> It matters for CPR of a device whose endpoints only exist on a non-zero
> altsetting, such as an isochronous streaming interface. Migrate the
> altsetting array in a subsection, gated to the CPR modes: only the CPR
> target consumes it to rebuild its endpoints, while a regular migration
> reopens the device and reconstructs the altsetting itself.
>
> 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/20261006-usb-host_v3-v8-0-72ae4fb8977b@virtuozzo.com?part=11
next prev parent reply other threads:[~2026-10-06 16:46 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 16:27 [PATCH QEMU HCI-8.0 v8 00/14] usb-host: support CPR migration Andrey Drobyshev
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 01/14] usb-host: don't leak hostdev FD on open failure #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:31 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 02/14] usb-host: don't leak config descriptor on claim " Andrey Drobyshev
2026-10-06 16:29 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 03/14] usb-host: add migration blocker for CPR modes #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:30 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 04/14] usb-host: preserve hostdev FD during CPR migration #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:38 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 05/14] usb-host: factor out usb_host_reap_xfers() #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:31 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 06/14] usb-host: drain in-flight URBs across CPR #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:38 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 07/14] usb-host: re-issue drained URBs if CPR is aborted #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:44 ` no-reply
2026-10-06 16:27 ` [PATCH QEMU HCI-8.0 v8 08/14] usb-host: skip product-string read on CPR incoming #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:41 ` no-reply
2026-10-06 16:28 ` [PATCH QEMU HCI-8.0 v8 09/14] usb-host: factor out usb_host_start_events() #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:41 ` no-reply
2026-10-06 16:28 ` [PATCH QEMU HCI-8.0 v8 10/14] usb-host: hand off the device across cpr-transfer #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:50 ` no-reply
2026-10-06 16:28 ` [PATCH QEMU HCI-8.0 v8 11/14] usb: migrate the interface altsetting #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:46 ` no-reply [this message]
2026-10-06 16:28 ` [PATCH QEMU HCI-8.0 v8 12/14] usb-host: reconfigure endpoints on CPR incoming #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:52 ` no-reply
2026-10-06 16:28 ` [PATCH QEMU HCI-8.0 v8 13/14] hcd-xhci: resync isochronous endpoints after CPR #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:53 ` no-reply
2026-10-06 16:28 ` [PATCH QEMU HCI-8.0 v8 14/14] usb-host: make CPR migration blocker conditional #VSTOR-137800 Andrey Drobyshev
2026-10-06 16:53 ` no-reply
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