Messages in this thread | | | Date | Thu, 24 Feb 2022 03:00:59 +0200 | From | 'Andy Shevchenko' <> | Subject | Re: [PATCH v1 1/1] IB/hfi1: Don't cast parameter in bit operations |
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On Wed, Feb 23, 2022 at 10:50:19PM +0000, David Laight wrote: > From: 'Andy Shevchenko' > > Sent: 23 February 2022 22:30 > > On Wed, Feb 23, 2022 at 09:44:32PM +0000, David Laight wrote: > > > From: Andy Shevchenko > > > > Sent: 23 February 2022 18:54
...
> > Either way it wastes cycles, the outcome depends on the actual distribution of > > the interrupts across the bitmap. If it gathered closer to the beginning of the > > bitmap, my code wins, otherwise the original ones. > > The loop in bitmap_empty() will kill you - even if the first word in non-zero.
What loop? Did you really look into implementation of bitmap_empty()?
-- With Best Regards, Andy Shevchenko
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