From: Stefano Brivio <sbrivio@redhat.com>
To: passt-dev@passt.top, David Gibson <david@gibson.dropbear.id.au>
Cc: Matej Hrica <mhrica@redhat.com>
Subject: Re: [PATCH v2 2/3] tcp: Force TCP_WINDOW_CLAMP before resetting STALLED flag
Date: Fri, 29 Sep 2023 17:44:12 +0200 [thread overview]
Message-ID: <20230929174412.52a93c03@elisabeth> (raw)
In-Reply-To: <20230929150446.2671959-3-sbrivio@redhat.com>
On Fri, 29 Sep 2023 17:04:45 +0200
Stefano Brivio <sbrivio@redhat.com> wrote:
> It looks like we need it as workaround for this situation, readily
> reproducible at least with a 6.5 Linux kernel, with default rmem_max
> and wmem_max values:
>
> - an iperf3 client on the host sends about 160 KiB, typically
> segmented into five frames by passt. We read this data using
> MSG_PEEK
>
> - the iperf3 server on the guest starts receiving
>
> - meanwhile, the host kernel advertised a zero-sized window to the
> receiver, as expected
Gosh, sorry, I forgot all the s/receiver/whatever/ here. Fixed locally
and not reposting, unless there's something else...
--
Stefano
next prev parent reply other threads:[~2023-09-29 15:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-29 15:04 [PATCH v2 0/3] Fixes and a workaround for TCP stalls with small buffers Stefano Brivio
2023-09-29 15:04 ` [PATCH v2 1/3] tcp: Fix comment to tcp_sock_consume() Stefano Brivio
2023-09-29 15:04 ` [PATCH v2 2/3] tcp: Force TCP_WINDOW_CLAMP before resetting STALLED flag Stefano Brivio
2023-09-29 15:44 ` Stefano Brivio [this message]
2023-10-03 2:47 ` David Gibson
2023-09-29 15:04 ` [PATCH v2 3/3] tcp, tap: Don't increase tap-side sequence counter for dropped frames Stefano Brivio
2023-10-03 2:50 ` David Gibson
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