Messages in this thread | | | Date | Sun, 10 Oct 1999 17:52:09 +0200 | From | Manfred Spraul <> | Subject | Re: locking question: do_mmap(), do_munmap() |
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Andrea Arcangeli wrote: > > On Sun, 10 Oct 1999, Manfred Spraul wrote: > > >But this means that both locks are required if you modify the vma list. > >Single reader, multiple writer synchronization. Unusual, but interesting > >:-) > > Yes, that's always been this way also in 2.2.x.
and which lock protects "mm->rss"?
It's not an atomic variable, but * increased by do_swap_page() outside lock_kernel. * decreased by the swapper.
I've started adding "assert_down()" and "assert_kernellocked()" macros, and now I don't see the login prompt any more...
eg. sys_mprotect calls merge_segments without lock_kernel().
-- Manfred
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