>There are no other callers AFAICS so I am getting clueless. Maybe more >debugging will tell us something (the inlining has been reduced for thp >paths which can reduce performance in thp page fault heavy workloads but >this will give us better traces - I hope). Michal, this was printing so many debug messages to console that the whole server hangs and i had to hard reset it after several minutes :( Sorry but i cannot test such a things in production. There's no problem with one soft reset which takes 4 minutes but this hard reset creates about 20 minutes outage (mainly cos of disk quotas checking). Last logged message: Dec 10 02:03:29 server01 kernel: [ 220.366486] grsec: From 141.105.120.152: bruteforce prevention initiated for the next 30 minutes or until service restarted, stalling each fork 30 seconds. Please investigate the crash report for /usr/lib/apache2/mpm-itk/apache2[apache2:3586] uid/euid:1258/1258 gid/egid:100/100, parent /usr/lib/apache2/mpm-itk/apache2[apache2:2142] uid/euid:0/0 gid/egid:0/0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>