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Chris Wilson authored
sysinfo() doesn't include all reclaimable memory. In particular it excludes the majority of global_node_page_state(NR_FILE_PAGES), reclaimable pages that are a copy of on-disk files It seems the only way to obtain this counter is by parsing /proc/meminfo. For comparison, check vm_enough_memory() which includes NR_FILE_PAGES as available (sadly there's no way to call vm_enough_memory() directly either!) v2: Pay attention to what one writes. v3: Trim off redundant space, and warn if the requested tags do not match the layout of /proc/meminfo. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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