Messages in this thread | | | Date | Sat, 09 Oct 1999 15:17:51 +0200 | From | Manfred Spraul <> | Subject | Re: locking question: do_mmap(), do_munmap() |
| |
Alexander Viro wrote: > Moreover, sys_uselib() may do > interesting things to cloned processes. IMO the right thing would be to > check for the number of mm users.
I don't know the details of the mm implementation, but if there is only one user, then down(&mm->mmap_sem) will never sleep, and you loose nothing by getting the semaphore.
I would prefer a clean implementation, ie always down() before do_mmap(), and ASSERT_DOWN() macros to enforce this.
-- Manfred
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |