Date: Fri, 22 Jan 2021 12:53:13 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 252913] Enable option TCPHPTS and WITH_EXTRA_TCP_STACKS=1 in the kernel causes a massive mbufs leaks Message-ID: <bug-252913-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D252913 Bug ID: 252913 Summary: Enable option TCPHPTS and WITH_EXTRA_TCP_STACKS=3D1 in the kernel causes a massive mbufs leaks Product: Base System Version: 12.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: iron.udjin@gmail.com OS: 12.2-STABLE stable/12-c243266-gd970a8218e16 In kernel conf: makeoptions WITH_EXTRA_TCP_STACKS=3D1 options TCPHPTS "netstat -m" in a few weeks of usage under high network load: 78365279/16/78365295 mbufs in use (current/cache/total) 43996/18104/62100/12244576 mbuf clusters in use (current/cache/total/max) 2429/16 mbuf+clusters out of packet secondary zone in use (current/cache) 12584/2975/15559/6122288 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/1814011 9k jumbo clusters in use (current/cache/total/max) 0/0/0/1020381 16k jumbo clusters in use (current/cache/total/max) 19729647K/48112K/19777759K bytes allocated to network (current/cache/total) 42375955/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 404032/0/33003 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 1899771 sendfile syscalls 399 sendfile syscalls completed without I/O request 1004979 requests for I/O initiated by sendfile 7900311 pages read by sendfile as part of a request 399 pages were valid at time of a sendfile request 0 pages were valid and substituted to bogus page 0 pages were requested for read ahead by applications 0 pages were read ahead by sendfile 0 times sendfile encountered an already busy page 0 requests for sfbufs denied 0 requests for sfbufs delayed As you can see, almost 20Gb of RAM allocated for network. Finally server becomes unreachable: [zone: mbuf] kern.ipc.nmbufs limit reached Additional info and counters: https://forums.freebsd.org/threads/mbufs-leaks.78480/ --=20 You are receiving this mail because: You are the assignee for the bug.=
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