add /proc/sys/vm/vm_pagecache_limit_async interface which
allow page caches reclaimed in kpclimitd, it will not consume
work threads runtime, but oom may be occured. it's closed default.
Signed-off-by: Zhiping Du <zhipingdu@tencent.com>
Signed-off-by: Chunguang Xu <brookxu@tencent.com>
We add cpuinfo and stat for each container which
used for docker to get cpu stat just for current
container.
Signed-off-by: Xiaoming Gao <newtongao@tencent.com>
Signed-off-by: Weiwei Li <nuonuoli@tencent.com>
Signed-off-by: Liu Hua <shookliu@tencent.com>
the print_fatal_signals sysctl can only dump fatal signals from receiver's side,
cannot find who and why send these fatal signals, so add a new sysctl
print_fatal_signals_src_dst to switch dump fatal signals from sender side.
Signed-off-by: Xiaoming Gao <newtongao@tencent.com>
create a pid mapping data to parent processes in file /proc/$PID/status
create a proc file (/proc/$PID/hostinfo), mapping pid data to host pid
Signed-off-by: Lorin Liu <lorinliu@tencent.com>
upstream commit: 356d1833b638bd465672aefeb71def3ab93fc17d
Note that when a new netns is created, it inherits its
sysctl_tcp_rmem and sysctl_tcp_wmem from initial netns.
This change is needed so that we can refine TCP rcvbuf autotuning,
to take RTT into consideration.
Signed-off-by: Hongbo Li <herberthbli@tencent.com>
upstream commit: a3dcaf17ee54f1d01d22cc2b22cab0b4f60d78cf
As we want to gradually implement per netns sysctl_rmem and sysctl_wmem
on per protocol basis, add two new fields in struct proto,
and two new helpers : sk_get_wmem0() and sk_get_rmem0()
First user will be TCP. Then UDP and SCTP can be easily converted,
while DECNET probably wont get this support.
Signed-off-by: Hongbo Li <herberthbli@tencent.com>
Chunguang Xu