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Re: [Qemu-devel] [PATCH 20/29] exec: invert return value of cpu_physical

From: Fam Zheng
Subject: Re: [Qemu-devel] [PATCH 20/29] exec: invert return value of cpu_physical_memory_get_clean, rename
Date: Tue, 26 May 2015 19:26:36 +0800
User-agent: Mutt/1.5.23 (2014-03-12)

On Mon, 04/27 18:28, Paolo Bonzini wrote:
> While it is obvious that cpu_physical_memory_get_dirty returns true even if
> a single page is dirty, the same is not true for 
> cpu_physical_memory_get_clean;
> one would expect that it returns true only if all the pages are clean, but
> it actually looks for even one clean page.  (By contrast, the caller of that
> function, cpu_physical_memory_range_includes_clean, has a good name).
> To clarify, rename the function to cpu_physical_memory_all_dirty and return
> true if _all_ the pages are dirty.  This is the opposite of the previous
> meaning, because "all are 1" is the same as "not (any is 0)", so we have to
> modify cpu_physical_memory_range_includes_clean as well.
> Signed-off-by: Paolo Bonzini <address@hidden>

Reviewed-by: Fam Zheng <address@hidden>

Then maybe we can rename cpu_physical_memory_is_clean to
cpu_physical_memory_has_clean, or as you suggested,
cpu_physical_memory_needs_notdirty (but wait, what is 'notdirty'? :), for a
similar reason.


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