Messages in this thread | | | Subject | Re: Core dumps for threads | Date | Sat, 24 Feb 2001 21:57:44 +0000 (GMT) | From | Alan Cox <> |
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> Can anyone explain why this test is in routine `do_coredump' > in file `fs/exec.c' in the 2.4.0 kernel? > > if (!current->dumpable || atomic_read(¤t->mm->mm_users) != 1) > goto fail; > > The only thing the test on `mm_users' seems to be doing is stopping > a thread process from dumping core. What's the rationale for this?
The I/O to dump the core would race other changes on the mm. The right fix is probably to copy the mm (as fork does) then dump the copy.
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