execve-question

DISCUSSION Manfred Spraul 2 participants 2 messages Oct 10, 1999 Memory management

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Manfred Spraul

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1999-10-10 15:31 UTC #0 lore raw

what happens / should happen if I call execve() in a multi-threaded application?

I don't see that the mm structure is copied, and obviously noone acquires the mm->mmap_sem.

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Manfred
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Alexander Viro

1999-10-10 16:12 UTC #1 lore raw

Quoted 5 lines · Manfred Spraul

what happens / should happen if I call execve() in a multi-threaded application?
I don't see that the mm structure is copied, and obviously noone acquires the mm->mmap_sem.

Check fs/exec.c::exec_mmap(). mmap_sem is _not_ needed here. We are not copying the mm - we are creating new one (exec drops all mappings). For $DEITY sake, stop applying band-aids.

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