Re: [PATCH net] tcp: make TCP_USER_TIMEOUT accurate for zero window probes
From: Jakub Kicinski <kuba@kernel.org>
Date: 2021-01-23 01:44:29
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On Fri, 22 Jan 2021 11:13:06 -0800 Enke Chen wrote:
From: Enke Chen <redacted>
The TCP_USER_TIMEOUT is checked by the 0-window probe timer. As the
timer has backoff with a max interval of about two minutes, the
actual timeout for TCP_USER_TIMEOUT can be off by up to two minutes.
In this patch the TCP_USER_TIMEOUT is made more accurate by taking it
into account when computing the timer value for the 0-window probes.
This patch is similar to the one that made TCP_USER_TIMEOUT accurate for
RTOs in commit b701a99e431d ("tcp: Add tcp_clamp_rto_to_user_timeout()
helper to improve accuracy").
Signed-off-by: Enke Chen <redacted>
Reviewed-by: Neal Cardwell <ncardwell@google.com>This is targeting net, any guidance on Fixes / backporting?