Commit 688aaef8 authored by Martin J. Bligh's avatar Martin J. Bligh Committed by Linus Torvalds

[PATCH] make vm_enough_memory more efficient

vm_enough_memory seems to call si_meminfo just to get the total
RAM, which seems far too expensive. This replaces the comment
saying "this is crap" with some code that's less crap.
parent 85850b21
......@@ -72,7 +72,6 @@ inline void vm_unacct_memory(long pages)
int vm_enough_memory(long pages)
{
unsigned long free, allowed;
struct sysinfo i;
atomic_add(pages, &vm_committed_space);
......@@ -113,12 +112,7 @@ int vm_enough_memory(long pages)
return 0;
}
/*
* FIXME: need to add arch hooks to get the bits we need
* without this higher overhead crap
*/
si_meminfo(&i);
allowed = i.totalram * sysctl_overcommit_ratio / 100;
allowed = totalram_pages * sysctl_overcommit_ratio / 100;
allowed += total_swap_pages;
if (atomic_read(&vm_committed_space) < allowed)
......
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