This is a quite old kernel version, probably already fixed... Begin forwarded message:
Date: Wed, 27 Jan 2021 01:48:33 +0000 From: bugzilla-dae...@bugzilla.kernel.org To: step...@networkplumber.org Subject: [Bug 211375] New: Memory leak about TCP slab which have too big used sockets https://bugzilla.kernel.org/show_bug.cgi?id=211375 Bug ID: 211375 Summary: Memory leak about TCP slab which have too big used sockets Product: Networking Version: 2.5 Kernel Version: 4.18.16 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: IPV4 Assignee: step...@networkplumber.org Reporter: 390231...@qq.com Regression: No Memory leak occurred in linux of 4.18.16, we use nginx as a server, I found some problems related to TCP as following: 1. slabtop a: OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME 14081971 13980986 99% 2.06K 938799 15 30041568K TCP 2. cat /proc/meminfo SUnreclaim: 31405028 kB 3. cat /proc/net/sockstat sockets: used 13976123 TCP: inuse 18 orphan 0 tw 44 alloc 18 mem 1 UDP: inuse 54 mem 45 UDPLITE: inuse 0 RAW: inuse 9 FRAG: inuse 0 memory 0 4. lsof there are 19000 line, it seems like ok. As above, it seems that tcp sk memory leak, "sockets: used 13976123" illustrate that "net->core.sock_inuse" is too big, which increase in inet_create(socket create) or sk_clone_lock(child socket create) and decrease in __sk_free, I kill almost all of application layer program, but the "sockets: used" almostly not reduce. Do you have any suggestions for this problem, Thanks. -- You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.
