Messages in this thread | | | Date | Mon, 16 Nov 2015 16:37:11 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH RFC] ioctl based CAT interface |
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On Mon, Nov 16, 2015 at 12:37:08PM -0200, Marcelo Tosatti wrote: > - position in bitmask represents nothing other than identification of > reservation and size, so: > > group-A = 0x3F, group-B = 0xFF > is the same as > group-A = 0xFC, group-B = 0xFF
No, the position very much matters; maybe not in this example, but it does the moment you get overlapping bitmaps.
Picking which bits overlap determines which other groups are affected.
This is why a bitmap is more expressive than a single percentage.
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