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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.4 (3.50.4-1.fc39) Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2024-05-31 at 16:54 +0800, Wen Gu wrote: > When copying smc settings to clcsock, avoid setting clcsock's sk_sndbuf > to sysctl_tcp_wmem[1], since this may overwrite the value set by > tcp_sndbuf_expand() in TCP connection establishment. >=20 > And the other setting sk_{snd|rcv}buf to sysctl value in > smc_adjust_sock_bufsizes() can also be omitted since the initialization > of smc sock and clcsock has set sk_{snd|rcv}buf to smc.sysctl_{w|r}mem > or ipv4_sysctl_tcp_{w|r}mem[1]. >=20 > Fixes: 30c3c4a4497c ("net/smc: Use correct buffer sizes when switching be= tween TCP and SMC") > Link: https://lore.kernel.org/r/5eaf3858-e7fd-4db8-83e8-3d7a3e0e9ae2@linu= x.alibaba.com > Signed-off-by: Wen Gu > --- > FYI, > The detailed motivation and testing can be found in the link above. My understanding is that there is an open question here if this is the expected and desired behavior. @Wenjia, @Jan: could you please have a look? Thanks! Paolo