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what is difference between fork and vfork?

kapilddit
1 New Member
when to use fork and vfork? I am using execl in my child. which one I need to use?
Apr 15 '14 #1
1 1314
techboy
28 New Member
vfork() is an obsolete optimization. Before good memory management, fork() made a full copy of the parent's memory, so it was pretty expensive. since in many cases a fork() was followed by exec(), which discards the current memory map and creates a new one, it was a needless expense. Nowadays, fork() doesn't copy the memory; it's simply set as "copy on write", so fork()+exec() is just as efficient as vfork()+exec().
Apr 15 '14 #2

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