Re: git: 73ee5756dee6 - main - Fixes in the tcp infrastructure with respect to stack changes as well as other infrastructure updates for incoming rack features.

From: Tomoaki AOKI <junchoon_at_dec.sakura.ne.jp>
Date: Sun, 21 May 2023 22:06:43 UTC
> On Tue, Apr 4, 2023 at 12:31 PM Randall Stewart <rrs@freebsd.org> wrote:
>>
>> The branch main has been updated by rrs:
>>
>> URL: https://cgit.FreeBSD.org/src/commit/?id=73ee5756dee6b2110eb6fb2b2ef3cde39a1fcb4f
>>
>> commit 73ee5756dee6b2110eb6fb2b2ef3cde39a1fcb4f
>> Author:     Randall Stewart <rrs@FreeBSD.org>
>> AuthorDate: 2023-04-01 05:46:38 +0000
>> Commit:     Randall Stewart <rrs@FreeBSD.org>
>> CommitDate: 2023-04-01 05:46:38 +0000
>>
>>     Fixes in the tcp infrastructure with respect to stack changes as well as other infrastructure updates for incoming rack features.
>>
>>     So stack switching as always been a bit of a issue. We currently use a break before make setup which means that
>>     if something goes wrong you have to try to get back to a stack. This patch among a lot of other things changes that so
>>     that it is a make before break. We also expand some of the function blocks in prep for new features in rack that will allow
>>     more controlled pacing. We also add other abilities such as the pathway for a stack to query a previous stack to acquire from
>>     it critical state information so things in flight don't get dropped or mis-handled when switching stacks. We also add the
>>     concept of a timer granularity. This allows an alternate stack to change from the old ticks granularity to microseconds and
>>     of course this even gives us a pathway to go to nanosecond timekeeping if we need to (something for the data center to consider
>>     for sure).
>>
>>     Once all this lands I will then update rack to begin using all these new features.
>>
>>     Reviewed by: tuexen
>>     Sponsored by: Netflix Inc
>>     Differential Revision: https://reviews.freebsd.org/D39210
> 
> Hi,
> 
> Could you hide some stuff in netinet/tcp.h?
> struct http_req breaks curl 8.1.0.
> 
> Antoine

Please refer to Bug 271526 [1], especially Comment 4 [2] by Jonathan
Reynolds.
A patch is proposed there inline (not as an attachment).

[1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271526

[2] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271526#c4

-- 
Tomoaki AOKI    <junchoon@dec.sakura.ne.jp>