Messages in this thread | | | Date | Fri, 5 Feb 1999 11:29:37 +0100 (CET) | From | Rik van Riel <> | Subject | Re: Anti-Linux SMP FUD |
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On Fri, 5 Feb 1999, Chris Wedgwood wrote: > On Sat, Jan 30, 1999 at 09:39:35PM +0000, Alan Cox wrote: > > > Partly the paths are nothing like as serialized as you might think. > > Sct has also done some patches (which DaveM then extended a lot) to > > drop kernel locks during cached data copies too. > > Something I see often, is that having two processes running on an > SMP box, accessing different devices, on different spindles -- > when one process is writing data out, the other pretty much blocks > in a D state.
This is very annoying, yes. The fact that it happens more so on IDE than on SCSI hints in the direction of the request queue and the driver structure...
drivers/block/ll_rw_blk.h
Rik -- If a Microsoft product fails, who do you sue? +-------------------------------------------------------------------+ | Linux Memory Management site: http://humbolt.geo.uu.nl/Linux-MM/ | | Nederlandse Linux documentatie: http://www.nl.linux.org/ | +-------------------------------------------------------------------+
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