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unreasonable. > > We can map multiple consecutive pages of a tmpfs folios at once according to > the size of the large folio. On one hand, this can reduce the overhead of page > faults; on the other hand, it can leverage hardware architecture optimizations > to reduce TLB misses, such as contiguous PTEs on the ARM architecture. > > Moreover, tmpfs mount will use the 'huge=' option to control large folio > allocation explicitly. So it can be understood that the process's RSS statistics > might increase, and I think this will not cause any obvious effects for users. > > Performance test: > I created a 1G tmpfs file, populated with 64K large folios, and write-accessed it > sequentially via mmap(). I observed a significant performance improvement: > > Before the patch: > real 0m0.158s > user 0m0.008s > sys 0m0.150s > > After the patch: > real 0m0.021s > user 0m0.004s > sys 0m0.017s > > Signed-off-by: Baolin Wang > --- > Changes from v1: > - Drop the unnecessary IS_ALIGNED() check, per David. > - Update the commit message, per David. > --- > mm/memory.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > LGTM. Acked-by: Zi Yan -- Best Regards, Yan, Zi