[RFC PATCH v1 03/57] mm/memcontrol: Fix seq_buf size to save memory when PAGE_SIZE is large

[Roman Gushchin]

On Mon, Oct 14, 2024 at 11:58:10AM +0100, Ryan Roberts wrote:
> 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 om 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.
> 
> Signed-off-by: Ryan Roberts <ryan.roberts at arm.com>

Acked-by: Roman Gushchin <roman.gushchin at linux.dev>

Thanks!