mm: replace various uses of num_physpages by totalram_pages

Sizing of memory allocations shouldn't depend on the number of physical
pages found in a system, as that generally includes (perhaps a huge amount
of) non-RAM pages.  The amount of what actually is usable as storage
should instead be used as a basis here.

Some of the calculations (i.e.  those not intending to use high memory)
should likely even use (totalram_pages - totalhigh_pages).

Signed-off-by: Jan Beulich <[email protected]>
Acked-by: Rusty Russell <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: Kyle McMartin <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Patrick McHardy <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jan Beulich 2009-09-21 17:03:05 -07:00 • committed by Linus Torvalds
commit 4481374ce8
21 changed files with 38 additions and 41 deletions

View file

@ -47,7 +47,7 @@ static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask)
return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
/* return (void *)__get_free_page(gfp_mask); */
}
if (likely(size >> PAGE_SHIFT < num_physpages))
if (likely((size >> PAGE_SHIFT) < totalram_pages))
return __vmalloc(size, gfp_mask, PAGE_KERNEL);
return NULL;
}