MFC r317208:
Syncoockies can be used in combination with the syncache. If the cache
overflows, syncookies are used.
This patch restricts the usage of syncookies in this case: accept
syncookies only if there was an overflow of the syncache recently.
This mitigates a problem reported in PR217637, where is syncookie was
accepted without any recent drops.
Thanks to glebius@ for suggesting an improvement.
PR: 217637
Reviewed by: gnn, glebius
Differential Revision: https://reviews.freebsd.org/D10272
git-svn-id: svn://svn.freebsd.org/base/stable/10@322315
ccf9f872-aa2e-dd11-9fc8-
001c23d0bc1f
projects / FreeBSD / stable / 10.git / commit