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mm: fix shmem THP counters on migration
The per node numa_stat values for shmem don't change on page migration for THP: grep shmem /sys/fs/cgroup/machine.slice/.../memory.numa_stat: shmem N0=1092616192 N1=10485760 shmem_thp N0=1092616192 N1=10485760 migratepages 9181 0 1: shmem N0=0 N1=1103101952 shmem_thp N0=1092616192 N1=10485760 Fix that by updating shmem_thp counters likewise to shmem counters on page migration. [jglauber@digitalocean.com: use folio_test_pmd_mappable instead of folio_test_transhuge] Link: https://lkml.kernel.org/r/20230622094720.510540-1-jglauber@digitalocean.com Link: https://lkml.kernel.org/r/20230619103351.234837-1-jglauber@digitalocean.com Signed-off-by: Jan Glauber <jglauber@digitalocean.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -486,6 +486,11 @@ int folio_migrate_mapping(struct address_space *mapping,
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if (folio_test_swapbacked(folio) && !folio_test_swapcache(folio)) {
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__mod_lruvec_state(old_lruvec, NR_SHMEM, -nr);
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__mod_lruvec_state(new_lruvec, NR_SHMEM, nr);
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if (folio_test_pmd_mappable(folio)) {
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__mod_lruvec_state(old_lruvec, NR_SHMEM_THPS, -nr);
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__mod_lruvec_state(new_lruvec, NR_SHMEM_THPS, nr);
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}
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}
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#ifdef CONFIG_SWAP
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if (folio_test_swapcache(folio)) {
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