On Fri, Feb 04, 2000 at 08:42:15PM +0100, Manfred Spraul wrote:
> Many functions such as try_to_swap_out() call flush_tlb_xy() while they
> own a spinlock (eg. mm->page_table_lock).
Really? Would you show me the call path from the spin lock aquire
to try_to_swap_out? I don't see it.
I do see
* NOTE! If it sleeps, it *must* return 1 to make sure we
* don't continue with the swap-out. Otherwise we may be
* using a process that no longer actually exists (it might
* have died while we slept).
attached to try_to_swap_out, so that's probably enough not to
call schedule, but I don't see any such spinlock held. Moreover,
the comment would seem to indicate it _is_ legal to sleep, so
long as you indicate that it happened.
r~
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