Messages in this thread | | | Date | Fri, 6 Apr 2001 19:02:32 +0200 | From | Andi Kleen <> | Subject | Re: 2 times faster rawio and several fixes (2.4.3aa3) |
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On Fri, Apr 06, 2001 at 07:07:01PM +0200, Andrea Arcangeli wrote: > However we can probably stay with the 512k atomic I/O otherwise the iobuf > structure will grow again of an order of 2. With 512k of atomic I/O the kiovec > structure is just 8756 in size (infact probably I should allocate some of the > structures dynamically instead of statics inside the kiobuf.. as it is now > with my patch it's not very reliable as it needs an allocation of order 2).
8756bytes wastes most of an order 2 allocation. Wouldn't it make more sense to round it up to 16k to use the four pages fully ? (if the increased atomic size doesn't have other bad effects -- i guess it's no problem anymore to lock down that much memory?)
-Andi
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