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mm: replace various uses of num_physpages by totalram_pages

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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
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2
mm/slab.c
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@ -1384,7 +1384,7 @@ void __init kmem_cache_init(void)
* Fragmentation resistance on low memory - only use bigger
* page orders on machines with more than 32MB of memory.
*/
if (num_physpages > (32 << 20) >> PAGE_SHIFT)
if (totalram_pages > (32 << 20) >> PAGE_SHIFT)
slab_break_gfp_order = BREAK_GFP_ORDER_HI;
/* Bootstrap is tricky, because several objects are allocated