El 29/04/2014 23:23, vipin sachdeva escribió:Is that value the errno value (get_native_error)? At least in linux (you haven't tell us which OS you are using), errno 13 is EACCES (Permission denied). ENOMEM is 12.
It is error code 13; basically I would like to find out out beforehand
how much maximum shared memory (using MemFree from /proc/meminfo, sysctl
info etc) I can allocate on a machine and only make an allocation that
big , and only allocate a segment of that size. Are there any other
system variables I need to consider ? Thanks.
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/errno-base.h
If you are referring to get_error_code(), then it's Interprocess' out_of_memory_error (it comes from ENOMEM Posix value).
Maybe you don't have a contiguous page of a page of size, there are more processes consuming pages, old shared memory created by shmget has not been freed... According to POSIX ENOMEM can be returned if "the amount of available physical memory is not sufficient to fill the request". Do you have enough physical memory (not virtual) free?
Perhaps you could debug the Interprocess code until the shmget() call to see if parameters are correctly passed to the OS. If those parameters are correct, then it's absolutely OS-dependent.
Best,
Ion
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