stable inclusion
from stable-v5.10.135
commit 77ac046a9ad3b9ee94d02f999d30db3ac106c98c
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5ZWFM

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=77ac046a9ad3b9ee94d02f999d30db3ac106c98c

--------------------------------

commit 4d8f24ee upstream.

This reverts commit 4a41f453.

This to-be-reverted commit was meant to apply a stricter rule for the
stack to enter pingpong mode. However, the condition used to check for
interactive session "before(tp->lsndtime, icsk->icsk_ack.lrcvtime)" is
jiffy based and might be too coarse, which delays the stack entering
pingpong mode.
We revert this patch so that we no longer use the above condition to
determine interactive session, and also reduce pingpong threshold to 1.

Fixes: 4a41f453 ("tcp: change pingpong threshold to 3")
Reported-by: NLemmyHuang <hlm3280@163.com>
Suggested-by: NNeal Cardwell <ncardwell@google.com>
Signed-off-by: NWei Wang <weiwan@google.com>
Acked-by: NNeal Cardwell <ncardwell@google.com>
Reviewed-by: NEric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220721204404.388396-1-weiwan@google.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>