From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <44D77D11.5080904@gmail.com> Date: Mon, 7 Aug 2006 19:49:05 +0200 From: =?ISO-8859-1?Q?Llu=EDs_Batlle_i_Rossell?= User-Agent: Thunderbird 1.5.0.4 (X11/20060724) MIME-Version: 1.0 To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] Swap considered harmful (Sorry) References: <24e96feb2532755e277da9dbf4b7f9f4@terzarima.net> <44B66FCA.3040308@lanl.gov> In-Reply-To: <44B66FCA.3040308@lanl.gov> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms050707090303050501070207" Topicbox-Message-UUID: 98a780ec-ead1-11e9-9d60-3106f5b1d025 This is a cryptographically signed message in MIME format. --------------ms050707090303050501070207 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Ronald G Minnich wrote: > Charles Forsyth wrote: > >> >> Linux apparently takes the Atlas approach and thrashes on demand. >> > > until it starts killing random processes. Usually the wrong one. But, > hey, heuristics, right? Maybe you already know, but by change I got into the linux malloc(3) manpage, and I found its BUGS section: BUGS By default, Linux follows an optimistic memory allocation strategy. This means that when malloc() returns non-NULL there is no guarantee that the memory really is available. This is a really bad bug. In case it turns out that the system is out of memory, one or more processes will be killed by the infamous OOM killer. In case Linux is employed under circumstances where it would be less desirable to suddenly lose some randomly picked processes, and moreover the kernel version is suf- ficiently recent, one can switch off this overcommitting behavior using a command like # echo 2 > /proc/sys/vm/overcommit_memory --------------ms050707090303050501070207 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJTTCC AwEwggJqoAMCAQICEC7GHhAgrXIK4gbYgnLRBvIwDQYJKoZIhvcNAQEEBQAwYjELMAkGA1UE BhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMT I1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBMB4XDTA2MDMxMzIyNTMwMVoX DTA3MDMxMzIyNTMwMVowRDEfMB0GA1UEAxMWVGhhd3RlIEZyZWVtYWlsIE1lbWJlcjEhMB8G CSqGSIb3DQEJARYSdmlyaWtldG9AZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A 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