Date: Sat, 11 Feb 2017 15:56:46 -0600 From: Karl Denninger <karl@denninger.net> To: wynkoop@wynn.com Cc: freebsd-arm@freebsd.org Subject: Re: Out of swap - NOT Message-ID: <6cf27c78-dc32-6282-d244-9158d89d3694@denninger.net> In-Reply-To: <assp.0215fa8ec5.20170211164459.1d0af6b1@pearl> References: <20170211023050.387b9cc7@pearl> <e4d1a59b-e8f6-78ef-2508-ee5282cd06de@denninger.net> <assp.0215fa8ec5.20170211164459.1d0af6b1@pearl>
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This is a cryptographically signed message in MIME format. --------------ms090001080300090901010205 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 2/11/2017 15:44, freebsd-arm@wynn.com wrote: > On Sat, 11 Feb 2017 07:54:10 -0600 > Karl Denninger <karl@denninger.net> wrote: > > > > In all probability it's really out. Remember that RAM allocation has= > > to either come from physical RAM or swap. If the requested allocatio= n > > cannot be made then you get this exact situation, and it happens > > quickly enough that you won't see it most of the time with monitoring= > > tools. > > > What's probably biting you is temporary file space, which comes from > > RAM since it's mounted on a ramdisk, and exhausts it. I've run into > > this same situation trying to build on a Pi2. > > > My recommendation? Connect a USB disk drive to the system and put a > > swap partition on there. Or cross-compile (which is what I do) on a > > nice big AMD64 box since that is MUCH faster. > > Greeting- > > I find it really hard to believe that I could be running out of swap, > but I suppose as a test I can stick additional swap on my USB drive. > There is already as I said 3xRam swap on the sd card. Yes perhaps my > pstat did not run at the exact right instant to see the OOM happen, but= > having started on PDP 11/70s running BSD 4.1 I have never seen a kernel= > build actually take that much memory. > > This exercise is not really about getting a new kernel built. Yes I > could cross on my Mac or one of my FreeBSD servers. It is about > beating on the system to see what it can do and how stable it is. When= > last I beat on USB disks under FreeBSD ARM the disks would just > disappear as far as the kernel was concerned. So I see there is much > improvement between 10 and 12. =20 > > This really begs the question how can my 586 at 133Mhz with 48M of ram > and 96M of swap build it's kernel (freebsd) and an arm box with more > real ram and 3x swap gets OOM issues? > > -Brett > Where's your temp directory mounted? By default that's usually on a ramdisk (md) on these builds, and that will bite you in exactly this fashion. That's why I said to connect a USB disk drive; stick your temp (and swap if you wish) on there and the problem should go away. tmp on md is a wise selection for any device that has main storage on an sd card as those things are both (very) slow and relatively fragile in terms of writes. However trying to buildworld/buildkernel there requires a LOT of transient space and if you don't have it... boom-boom. --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms090001080300090901010205 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC BlwwggZYMIIEQKADAgECAgE9MA0GCSqGSIb3DQEBCwUAMIGQMQswCQYDVQQGEwJVUzEQMA4G A1UECBMHRmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3Rl bXMgTExDMRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhND dWRhIFN5c3RlbXMgTExDIENBMB4XDTE2MTIxODE5NDUzNVoXDTIxMTIxNzE5NDUzNVowVzEL MAkGA1UEBhMCVVMxEDAOBgNVBAgTB0Zsb3JpZGExGTAXBgNVBAoTEEN1ZGEgU3lzdGVtcyBM TEMxGzAZBgNVBAMUEmthcmxAZGVubmluZ2VyLm5ldDCCAiIwDQYJKoZIhvcNAQEBBQADggIP ADCCAgoCggIBAM2N5maxs7NkoY9g5NMxFWll0TYiO7gXrGZTo3q25ZJgNdPMwrntLz/5ewE9 07TEbwJ3ah/Ep9BfZm7JF9vTtE1HkgKtXNKi0pawNGm1Yn26Dz5AbUr1byby6dFtDJr14E07 trzDCtRRvTkOVSBj6PQPal0fAnDtkIYQBVcuMkXkuMCtyfE95pjm8g4K9l7lAcKii3T1/3rE hCc1o2nBnb7EN1/XwBeCDGB+I2SN/ftZDbKQqGAF5q9dUn+iXU7Z/CVSfUWmhVh6cVZA4Ftv TglUqj410OuPx+cUQch3h1kFgsuhQR63HiJc3HbRJllHsV0rihvL1CjeARQkhnA6uY9NLFST p5I/PfzBzW2MSmtN/tGZvmfKKnmtbfUNgkzbIR1K3lsum+yEL71kB93Xtz/4f1demEx5c8TJ RBIniDHjDeLGK1aoBu8nfnvXAvgthFNTWBOEoR49AHEPjC3kZj0l8JQml1Y8bTQD5gtC5txl klO60WV0EufU7Hy9CmynMuFtjiA2v71pm097rXeCdrAKgisdYeEESB+SFrlY65rLiLv4n8o1 PX7DqRfqKkOYIakZ0ug/yHVKcq2EM3RiJxwzls5gT70CoOBlKbrC98O8TA6teON0Jq30M06t NTI2HhvNbJDLbBH+Awf4h1UKB+0ufENwjVvF5Jfz8Ww/FaSDAgMBAAGjgfQwgfEwNwYIKwYB BQUHAQEEKzApMCcGCCsGAQUFBzABhhtodHRwOi8vY3VkYXN5c3RlbXMubmV0Ojg4ODgwCQYD VR0TBAIwADARBglghkgBhvhCAQEEBAMCBaAwCwYDVR0PBAQDAgXgMCwGCWCGSAGG+EIBDQQf Fh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4EFgQUpfAI3y+751pp9A0w 6vJHx8RoR/MwHwYDVR0jBBgwFoAUJHGbnYV9/N3dvbDKkpQDofrTbTUwHQYDVR0RBBYwFIES a2FybEBkZW5uaW5nZXIubmV0MA0GCSqGSIb3DQEBCwUAA4ICAQBiB6MlugxYJdccD8boZ/u8 d8VxmLkJCtbfyYHRjYdyoABLW5hE3k3xSpYCM9L7vzWyV/UWwDYKi4ZzxHo4g+jG/GQZfKhx v38BQjL2G9xD0Hn2d+cygOq3UPjVYlbbfQoew6JbyCFXrrZ7/0jvRMLAN2+bRC7ynaFUixPH Whnj9JSH7ieYdzak8KN+G2coIC2t2iyfXVKehzi5gdNQ0vJ7+ypbGsRm4gE8Mdo9N/WgFPvZ HPFqR9Dwas7Z+aHwOabpk5r/336SyjOaZsn3MqKJQZL6GqDKusVOCWt+9uFAD8kadg7FetZe atIoD9I+zbp59oVoMnkMDMx7Hi85faU03csusqMGsjSsAzWSI1N8PJytZlchLiykokLKc3OL G87QKlErotlou7cfPX2BbEAH5wmkj9oiqZhxIL/wwAUA+PkiTbEmksKBNompSjUq/6UsR8EA s74gnu17lmijv8mrg2qMlwRirE7qG8pnE8egLtCDxcjd0Of9WMi2NJskn0/ovC7P+J60Napl m3ZIgPJst1piYSE0Zc1FIat4fFphMfK5v4iLblo1tFSlkdx1UNDGdg/U+LaXkNVXlMp8fyPm R80V6cIrCAlEWnBJNxG1UyfbbsvNMCCZBM4faGGsR/hhQOiydlruxhjL6P8J2WV8p11DdeGx KymWoil2s1J5WTGCBRMwggUPAgEBMIGWMIGQMQswCQYDVQQGEwJVUzEQMA4GA1UECBMHRmxv cmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3RlbXMgTExDMRww GgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhNDdWRhIFN5c3Rl bXMgTExDIENBAgE9MA0GCWCGSAFlAwQCAwUAoIICTTAYBgkqhkiG9w0BCQMxCwYJKoZIhvcN AQcBMBwGCSqGSIb3DQEJBTEPFw0xNzAyMTEyMTU2NDZaME8GCSqGSIb3DQEJBDFCBEBlaoDn mXMuo41D1zDZkZ0VxaJqrmOKcayeoDDwcoMz7v6fpEM6GRrjeM+Tj1bpIC8S2MhTt8EsnFix 0cmI7KMlMGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEqMAsGCWCGSAFlAwQBAjAKBggq hkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAwBwYFKw4DAgcwDQYIKoZI hvcNAwICASgwgacGCSsGAQQBgjcQBDGBmTCBljCBkDELMAkGA1UEBhMCVVMxEDAOBgNVBAgT B0Zsb3JpZGExEjAQBgNVBAcTCU5pY2V2aWxsZTEZMBcGA1UEChMQQ3VkYSBTeXN0ZW1zIExM QzEcMBoGA1UEAxMTQ3VkYSBTeXN0ZW1zIExMQyBDQTEiMCAGCSqGSIb3DQEJARYTQ3VkYSBT eXN0ZW1zIExMQyBDQQIBPTCBqQYLKoZIhvcNAQkQAgsxgZmggZYwgZAxCzAJBgNVBAYTAlVT MRAwDgYDVQQIEwdGbG9yaWRhMRIwEAYDVQQHEwlOaWNldmlsbGUxGTAXBgNVBAoTEEN1ZGEg U3lzdGVtcyBMTEMxHDAaBgNVBAMTE0N1ZGEgU3lzdGVtcyBMTEMgQ0ExIjAgBgkqhkiG9w0B CQEWE0N1ZGEgU3lzdGVtcyBMTEMgQ0ECAT0wDQYJKoZIhvcNAQEBBQAEggIAw4yz13QnyPU5 G0+i2LiCI/+Yas2zPXbK5NbvSjJd0/2nde8fmZQCPovppD/KCK8FCJZ2HioX74ONgNplaQ9+ LEkwh76wirE7xuMQjNzvGZUohxYiMu2IaQpBc7YdYEhgrMhD4uE3d08uHSRQpySOw7O8Pmkt aW2ZYbg7Snj5Jlmn4C1VwEHOBCuw/2Z3BKL/XUcroSQzwcQ1Wmn9UFbhV13NI7rskSsv6V8+ QPVW8OJuk/foHmmiaryglo1tTJgsVWB+CGCLOl11GkfBICd1ty94G7Nyh7IkAQIeWsJhhBvz bsM6RVNJdrgaMgK3SJ6mzuEpEjR/LnWfaml19PlZlfHZjyg776ej7kayc4jTq24XfHBxXZsK GgFCGIm8ZOwmRnIqGUeeN6g47UgQCIY2L2DtKdIM3DM+hf58SRRR/ydhTxNqw1B/TYLgc0Ht c7oerXJtp9zQqE42HHCZ7s6nfJUwh9SO1t3I1dmxRuDbj+6u5lFfiDj8RVgyglalTfjwf+LK wW0He+KfW2ZkvKmPIShZ6vm2CU/jEeKgSu9ETSvjNchpWs+UqVfCXmVdcMfGYO+TdtkyrP/5 kL6ZHFq3SXVUTnRQuqP0RbBo0C/6aSTeXih1FRhliT300eTXJkWtEBnM5dl3IqJMzTsDpktF 747SWnNg0pKrhnpN3EhjyBgAAAAAAAA= --------------ms090001080300090901010205--
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