On Sat, 14 Apr 2001, Marcelo Tosatti wrote:
> There is a nasty race between shmem_getpage_locked() and
> swapin_readahead() with the new shmem code (introduced in
> 2.4.3-ac3 and merged in the main tree in 2.4.4-pre3):
> I don't see any clean fix for this one.
> Suggestions ?
As we discussed with Alan on irc, we could remove the (physical)
swapin_readahead() and get 2.4 stable. Once 2.4 is stable we
could (if needed) introduce a virtual address based readahead
strategy for swap-backed things ... most of that code has been
ready for months thanks to Ben LaHaise.
A virtual-address based readahead not only makes much more sense
from a performance POV, it also cleanly gets the ugly locking
issues out of the way.
regards,
Rik
--
Linux MM bugzilla: http://linux-mm.org/bugzilla.shtml
Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...
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