mm/memcontrol: fix seq_buf size to save memory when PAGE_SIZE is large

Previously the seq_buf used for accumulating the memory.stat output was
sized at PAGE_SIZE.  But the amount of output is invariant to PAGE_SIZE;
If 4K is enough on a 4K page system, then it should also be enough on a
64K page system, so we can save 60K on the static buffer used in
mem_cgroup_print_oom_meminfo().  Let's make it so.

This also has the beneficial side effect of removing a place in the code
that assumed PAGE_SIZE is a compile-time constant.  So this helps our
quest towards supporting boot-time page size selection.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ryan Roberts <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Acked-by: Shakeel Butt <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Roman Gushchin <[email protected]>
Acked-by: Muchun Song <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions