From 1bab4c75075b84675b96992ac47580a57c26958d Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Thu, 24 Jul 2014 16:50:37 +0200 Subject: [PATCH] inet: frag: set limits and make init_net's high_thresh limit global This patch makes init_net's high_thresh limit to be the maximum for all namespaces, thus introducing a global memory limit threshold equal to the sum of the individual high_thresh limits which are capped. It also introduces some sane minimums for low_thresh as it shouldn't be able to drop below 0 (or > high_thresh in the unsigned case), and overall low_thresh should not ever be above high_thresh, so we make the following relations for a namespace: init_net: high_thresh - max(not capped), min(init_net low_thresh) low_thresh - max(init_net high_thresh), min (0) all other namespaces: high_thresh = max(init_net high_thresh), min(namespace's low_thresh) low_thresh = max(namespace's high_thresh), min(0) The major issue with having low_thresh > high_thresh is that we'll schedule eviction but never evict anything and thus rely only on the timers. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- Reading git-format-patch failed