-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 6/26/10 18:57 , John Obbele wrote:
After digging things a little, it seems I am messing with the System.Process.createProcess function : none of my spawned process terminates and eventually my OS freezes. (trivia: well now, I know that Fedora cannot handle more than 1100 processes on my cheap laptop ^^)
I've attached a small haskell file which can easily reproduces my problem. If you, carefully, run it from the GHCi prompt while monitoring your pool of processes, you will probably see a hundred of zombie processes appearing.
You need to reap zombies manually; take a look at System.Process.waitForProcess. (On POSIX-ish systems, including Linux, you can use the signal handling functions to auto-reap; on Linux simply setting SIGCHLD to SIG_IGN is good enough, but other systems (*BSD, OSX) require you to also set the SA_NOCLDWAIT flag and for portability you should include it. (Which, I note, doesn't seem to be supported in System.Posix.Signals. O Haskell gods: Bug?) - -- brandon s. allbery [linux,solaris,freebsd,perl] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkwmokUACgkQIn7hlCsL25W2tACfaWaPdUI3h08Ie8CgRd30PaXF 3bMAn1SckfRXKygSS/FhpOL5Vs6/wwjk =rkBx -----END PGP SIGNATURE-----