Date: Tue, 18 Mar 2014 22:36:49 -0500 From: Karl Denninger <karl@denninger.net> To: John Baldwin <jhb@freebsd.org> Cc: Alan Cox <alc@freebsd.org>, freebsd-hackers@freebsd.org Subject: Re: Tracking down what has inact pages locked up Message-ID: <532910D1.3010704@denninger.net> In-Reply-To: <201403181730.02471.jhb@freebsd.org> References: <53260B36.2070409@denninger.net> <201403181505.47349.jhb@freebsd.org> <5328A024.6050901@denninger.net> <201403181730.02471.jhb@freebsd.org>
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This is a cryptographically signed message in MIME format. --------------ms090903070803080600020206 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable On 3/18/2014 4:30 PM, John Baldwin wrote: > On Tuesday, March 18, 2014 3:36:04 pm Karl Denninger wrote: >> On 3/18/2014 2:05 PM, John Baldwin wrote: >>> On Sunday, March 16, 2014 4:36:06 pm Karl Denninger wrote: >>>> Is there a reasonable way to determine who or what has that memory >>>> locked up -- and thus why the vm system is not demoting that space i= nto >>>> the cache bucket so it can be freed (which, if my understanding is >>>> correct, should be happening long before now!) >>> I have a hackish thing (for 8.x, might work on 10.x) to let you figur= e out >>> what is using up RAM. This should perhaps go into the base system at= some >>> point. >>> >>> Grab the bits at http://people.freebsd.org/~jhb/vm_objects/ >>> >>> You will want to build the kld first and use 'make load' to load it. = It adds >>> a new sysctl that dumps info about all the VM objects in the system. = You can >>> then build the 'vm_objects' tool and run it. It can take a while to = run if >>> you have NFS mounts, so I typically save its output to a file first a= nd then >>> use sort on the results. sort -n will show you the largest consumer = of RAM, >>> sort -n -k 3 will show you the largest consumer of inactive pages. N= ote >>> that 'df' and 'ph' objects are anonymous, and that filename paths are= n't >>> always reliable, but this can still be useful. >>> >> Thanks. >> >> I suspect the cause of the huge inact consumption is a RAM leak in the= >> NAT code in IPFW. It was not occurring in 9.2-STABLE, but is on >> 10.0-STABLE, and reverting to natd in userland stops it -- which >> pretty-well isolates where it's coming from. > Memory for in-kernel NAT should be wired pages, not inactive. Yeah, should be. :-) But..... it managed to lock up 19GB of the 24GB the system has in inact=20 pages over 12 hours, and dropping the system to single user and=20 unloading the modules did not release the RAM...... which is why the=20 question (on how to track down what the hell is going on.) Changing the config back to natd as opposed to in-kernel NAT, however,=20 made the problem disappear. --=20 -- Karl karl@denninger.net --------------ms090903070803080600020206 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIFTzCC BUswggQzoAMCAQICAQgwDQYJKoZIhvcNAQEFBQAwgZ0xCzAJBgNVBAYTAlVTMRAwDgYDVQQI EwdGbG9yaWRhMRIwEAYDVQQHEwlOaWNldmlsbGUxGTAXBgNVBAoTEEN1ZGEgU3lzdGVtcyBM TEMxHDAaBgNVBAMTE0N1ZGEgU3lzdGVtcyBMTEMgQ0ExLzAtBgkqhkiG9w0BCQEWIGN1c3Rv bWVyLXNlcnZpY2VAY3VkYXN5c3RlbXMubmV0MB4XDTEzMDgyNDE5MDM0NFoXDTE4MDgyMzE5 MDM0NFowWzELMAkGA1UEBhMCVVMxEDAOBgNVBAgTB0Zsb3JpZGExFzAVBgNVBAMTDkthcmwg RGVubmluZ2VyMSEwHwYJKoZIhvcNAQkBFhJrYXJsQGRlbm5pbmdlci5uZXQwggIiMA0GCSqG SIb3DQEBAQUAA4ICDwAwggIKAoICAQC5n2KBrBmG22nVntVdvgKCB9UcnapNThrW1L+dq6th d9l4mj+qYMUpJ+8I0rTbY1dn21IXQBoBQmy8t1doKwmTdQ59F0FwZEPt/fGbRgBKVt3Quf6W 6n7kRk9MG6gdD7V9vPpFV41e+5MWYtqGWY3ScDP8SyYLjL/Xgr+5KFKkDfuubK8DeNqdLniV jHo/vqmIgO+6NgzPGPgmbutzFQXlxUqjiNAAKzF2+Tkddi+WKABrcc/EqnBb0X8GdqcIamO5 SyVmuM+7Zdns7D9pcV16zMMQ8LfNFQCDvbCuuQKMDg2F22x5ekYXpwjqTyfjcHBkWC8vFNoY 5aFMdyiN/Kkz0/kduP2ekYOgkRqcShfLEcG9SQ4LQZgqjMpTjSOGzBr3tOvVn5LkSJSHW2Z8 Q0dxSkvFG2/lsOWFbwQeeZSaBi5vRZCYCOf5tRd1+E93FyQfpt4vsrXshIAk7IK7f0qXvxP4 GDli5PKIEubD2Bn+gp3vB/DkfKySh5NBHVB+OPCoXRUWBkQxme65wBO02OZZt0k8Iq0i4Rci WV6z+lQHqDKtaVGgMsHn6PoeYhjf5Al5SP+U3imTjF2aCca1iDB5JOccX04MNljvifXgcbJN nkMgrzmm1ZgJ1PLur/ADWPlnz45quOhHg1TfUCLfI/DzgG7Z6u+oy4siQuFr9QT0MQIDAQAB o4HWMIHTMAkGA1UdEwQCMAAwEQYJYIZIAYb4QgEBBAQDAgWgMAsGA1UdDwQEAwIF4DAsBglg hkgBhvhCAQ0EHxYdT3BlblNTTCBHZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYEFHw4 +LnuALyLA5Cgy7T5ZAX1WzKPMB8GA1UdIwQYMBaAFF3U3hpBZq40HB5VM7B44/gmXiI0MDgG CWCGSAGG+EIBAwQrFilodHRwczovL2N1ZGFzeXN0ZW1zLm5ldDoxMTQ0My9yZXZva2VkLmNy bDANBgkqhkiG9w0BAQUFAAOCAQEAZ0L4tQbBd0hd4wuw/YVqEBDDXJ54q2AoqQAmsOlnoxLO 31ehM/LvrTIP4yK2u1VmXtUumQ4Ao15JFM+xmwqtEGsh70RRrfVBAGd7KOZ3GB39FP2TgN/c L5fJKVxOqvEnW6cL9QtvUlcM3hXg8kDv60OB+LIcSE/P3/s+0tEpWPjxm3LHVE7JmPbZIcJ1 YMoZvHh0NSjY5D0HZlwtbDO7pDz9sZf1QEOgjH828fhtborkaHaUI46pmrMjiBnY6ujXMcWD pxtikki0zY22nrxfTs5xDWGxyrc/cmucjxClJF6+OYVUSaZhiiHfa9Pr+41okLgsRB0AmNwE f6ItY3TI8DGCBQowggUGAgEBMIGjMIGdMQswCQYDVQQGEwJVUzEQMA4GA1UECBMHRmxvcmlk YTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3RlbXMgTExDMRwwGgYD VQQDExNDdWRhIFN5c3RlbXMgTExDIENBMS8wLQYJKoZIhvcNAQkBFiBjdXN0b21lci1zZXJ2 aWNlQGN1ZGFzeXN0ZW1zLm5ldAIBCDAJBgUrDgMCGgUAoIICOzAYBgkqhkiG9w0BCQMxCwYJ KoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNDAzMTkwMzM2NDlaMCMGCSqGSIb3DQEJBDEW BBTHwpylKj46M01Nd0QMNK+qeU/CBjBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIG0BgkrBgEEAYI3EAQxgaYwgaMwgZ0xCzAJBgNV BAYTAlVTMRAwDgYDVQQIEwdGbG9yaWRhMRIwEAYDVQQHEwlOaWNldmlsbGUxGTAXBgNVBAoT EEN1ZGEgU3lzdGVtcyBMTEMxHDAaBgNVBAMTE0N1ZGEgU3lzdGVtcyBMTEMgQ0ExLzAtBgkq hkiG9w0BCQEWIGN1c3RvbWVyLXNlcnZpY2VAY3VkYXN5c3RlbXMubmV0AgEIMIG2BgsqhkiG 9w0BCRACCzGBpqCBozCBnTELMAkGA1UEBhMCVVMxEDAOBgNVBAgTB0Zsb3JpZGExEjAQBgNV BAcTCU5pY2V2aWxsZTEZMBcGA1UEChMQQ3VkYSBTeXN0ZW1zIExMQzEcMBoGA1UEAxMTQ3Vk YSBTeXN0ZW1zIExMQyBDQTEvMC0GCSqGSIb3DQEJARYgY3VzdG9tZXItc2VydmljZUBjdWRh c3lzdGVtcy5uZXQCAQgwDQYJKoZIhvcNAQEBBQAEggIAMw9pYZ+MtiFkDU9V0mG3z/ns4A1x C6s2SCzUVUbulQm1yY+mfijvmDI5tqJV0JaREjLLOXFabqiLulz1mIecBZQiPvOc/hD7UKYK 4RMTquhbAYT40M7MfbFKWpRkzwfQDy71vB2aZP9pIoEJtpn9n+1hM2LJsCMyUJPi54Rpr0jD 8mdSHkQFW7N9uTQ3Ctc7mxIfvJp/2lfpfzZMP7tiMfcFWXUJd3N+BRxAHLC8eqNI/p/XYUdg E7ldOOdQ7hGyXLpQcmA/WGUggqqpWzFLkjQ0sikDGWJE43cTu3coPO9Pdn43aPYsKzny1yt6 Mwg8r4Nai/DYEiiZIigDMAA5CUIqMi8DycpjSSnWIR0+FZc9aCETtyxpSB+/EOGAUpv8s8Kp 349U4mDBWJOME1ZGrK8gV/21JdeQg821uIYWzoZtThyz8K8CQI8aJTiI3IvhAkxYXeEpWdlM XpIe9wstUrFilkj671pEcQOuoALYB6mUHh3l4XqAAMv5cH+7Vp+uP8J9/2nxq8cvpG87mPw/ BMqLvaH9ZIFqktUlOtVqAjpy8Fbb9593Dt9LFd+Iw2ttdgrlJISmbO9dDW2BNbW8Xo7RwpFF 9wicQwW+bFNpCAtMhWcbvPj2e5Xk/B/C01VdYqzFo3RpLoTwc1Z40XeU+sZB0GrNjldzPOYq sC+pU+4AAAAAAAA= --------------ms090903070803080600020206--
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