From: no-reply@sashiko.virtuozzo.com
To: khorenko@virtuozzo.com, Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH hci-8.1 5/8] ms/mptcp: explicitly drop over memory limits
Date: Fri, 6 Nov 2026 03:10:00 +0000 [thread overview]
Message-ID: <010701a1aed5aa46-7570586a-a2c6-4536-8e6c-514f713489d4-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20261106030306.16014-6-eva.kurchatova@virtuozzo.com>
> From: Paolo Abeni <pabeni@redhat.com>
>
> Currently the enforcement of the rcvbuf constraint is implemented
> when moving the skbs into the msk receive or OoO queue, keeping the
> incoming skbs in the subflow queue when over limits.
>
> Under significant memory pressure the above can cause permanent data
> transfer stalls, as the skb needed to make forward progress can be
> stuck in a subflow queue.
>
> Over memory limits, drop the incoming skb, relying on MPTCP-level
> retransmissions.
>
> Note that fallback socket must perform the limit before the skb reaches
> the subflow-level queue, as dropping an in-sequence already acked skb
> [ ... ]
> is already there.
>
> https://virtuozzo.atlassian.net/browse/VSTOR-153491
> Feature: fix ms/net
> Signed-off-by: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261106030306.16014-1-eva.kurchatova@virtuozzo.com?part=5
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next prev parent reply other threads:[~2026-11-06 3:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-06 3:02 [Devel] [PATCH hci-8.1 0/8] ms/mptcp: stability fixes Eva Kurchatova
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 1/8] ms/mptcp: fix retransmission loop when csum is enabled Eva Kurchatova
2026-11-06 3:07 ` no-reply
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 2/8] ms/mptcp: move the retrans loop to a separate helper Eva Kurchatova
2026-11-06 3:06 ` no-reply
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 3/8] ms/mptcp: move the stale logic out of retrans scheduler Eva Kurchatova
2026-11-06 3:07 ` no-reply
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 4/8] ms/mptcp: let the retrans scheduler do its job Eva Kurchatova
2026-11-06 3:10 ` no-reply
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 5/8] ms/mptcp: explicitly drop over memory limits Eva Kurchatova
2026-11-06 3:10 ` no-reply [this message]
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 6/8] ms/mptcp: implemented OoO queue pruning Eva Kurchatova
2026-11-06 3:11 ` no-reply
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 7/8] ms/mptcp: being below memory limit is a likely() condition Eva Kurchatova
2026-11-06 3:10 ` no-reply
2026-11-06 3:02 ` [Devel] [PATCH hci-8.1 8/8] ms/mptcp: avoid pruning for OoW data Eva Kurchatova
2026-11-06 3:11 ` no-reply
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