Re: [PATCH 0/8] Fragmentation Avoidance V17

[Paul Jackson <pj@sgi.com>]

Mel wrote:
> +#define __GFP_USER       0x80000u  /* User and other easily reclaimed pages */
> +#define __GFP_KERNRCLM   0x100000u /* Kernel page that is reclaimable */

Sorry, but that __GFP_USER name is still sticking in my craw.

I won't try to reopen my quest to get it named __GFP_REALLY_REALLY_EASY_RCLM
or whatever it was, but instead will venture on a new quest.

Can we get the 'RCLM' in there.  Especially since this term appears
naked in such code as:

> -				page = alloc_page(GFP_HIGHUSER);
> +				page = alloc_page(GFP_HIGHUSER|__GFP_USER);

where it is not at all obvious to the reader of this file (fs/exec.c)
that the __GFP_USER term is commenting on the reclaim behaviour of
the page to be allocated.

I'd be happier with:

> +#define __GFP_USERRCLM    0x80000u /* User and other easily reclaimed pages */
> +#define __GFP_KERNRCLM   0x100000u /* Kernel page that is reclaimable */

and:

> -				page = alloc_page(GFP_HIGHUSER);
> +				page = alloc_page(GFP_HIGHUSER|__GFP_USERRCLM);

Also the bold assymetry of these two #defines seems to be without motivation,
one with the 'RCLM', and the other with '    ' four spaces.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.925.600.0401

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