Short question: Is there a way to increase the stack size limit for a user process beyond 64mb?
Background: FreeBSD in question is 5.2.1-RELEASE. I am running an application (unison from /usr/ports/net/unison). This program by virtue to how it was developed (or possibly the language is uses, that being ocaml) uses a large amount of stack space when syncing large directory structures. With directory structures that contain on the order of 30,000 files, unison runs out of stack. Using the bash shell: ulimit reports a stack limit of 65536k: # ulimit -a core file size (blocks, -c) unlimited data seg size (kbytes, -d) 524288 file size (blocks, -f) unlimited max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 11095 pipe size (512 bytes, -p) 1 stack size (kbytes, -s) 65536 cpu time (seconds, -t) unlimited max user processes (-u) 5547 virtual memory (kbytes, -v) unlimited Doing ulimit -s with a higher value does not seem to produce an error or change to this value. A little C++ program that I wrote to test stack limits confirms the 64mb limit, regardless of what I tell ulimit. Source is attached.
stack-test.cpp
Description: Binary data
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