severity 333645 wishlist
thanks

On Thu, Oct 13, 2005 at 01:22:56AM -0300, Henrique de Moraes Holschuh wrote:
Filling this bug as normal instead of wishlist because the lack of O_DIRECT
in dd during big io takss causes the kernel to pratically discard all useful
cached data and inodes, thus degrading system performance a great deal for
no good reason.

That's a kernel issue, not a dd issue. There are plans to fix that in
2.6.14 by less aggressively caching data for processes that behave like
dd (or copy, which does exactly the same thing).

Mike Stone


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