Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH/RFC] Futex mmap_sem deadlock | Date | Wed, 23 Feb 2005 11:42:47 +0000 |
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Andrew Morton <akpm@osdl.org> wrote:
> wrt this down_read/down_write/down_read deadlock: iirc, the reason why > down_write() takes precedence over down_read() is to avoid the permanent > writer starvation which would occur if there is heavy down_read() traffic.
down_write() doesn't actually take precedence over down_read() as such. The rwsems try to implement a strict FIFO queue (the fairness thing).
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