mm/vmscan: define macros for refaults in struct lruvec
The magic number 0 and 1 are used in several places in vmscan.c. Define macros for them to improve code readability. Link: https://lkml.kernel.org/r/20220808005644.1721066-1-yang.yang29@zte.com.cn Signed-off-by: Yang Yang <yang.yang29@zte.com.cn> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -306,6 +306,8 @@ static inline bool is_active_lru(enum lru_list lru)
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return (lru == LRU_ACTIVE_ANON || lru == LRU_ACTIVE_FILE);
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}
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#define WORKINGSET_ANON 0
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#define WORKINGSET_FILE 1
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#define ANON_AND_FILE 2
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enum lruvec_flags {
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@ -3230,7 +3230,7 @@ again:
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refaults = lruvec_page_state(target_lruvec,
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WORKINGSET_ACTIVATE_ANON);
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if (refaults != target_lruvec->refaults[0] ||
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if (refaults != target_lruvec->refaults[WORKINGSET_ANON] ||
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inactive_is_low(target_lruvec, LRU_INACTIVE_ANON))
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sc->may_deactivate |= DEACTIVATE_ANON;
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else
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@ -3243,7 +3243,7 @@ again:
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*/
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refaults = lruvec_page_state(target_lruvec,
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WORKINGSET_ACTIVATE_FILE);
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if (refaults != target_lruvec->refaults[1] ||
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if (refaults != target_lruvec->refaults[WORKINGSET_FILE] ||
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inactive_is_low(target_lruvec, LRU_INACTIVE_FILE))
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sc->may_deactivate |= DEACTIVATE_FILE;
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else
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@ -3559,9 +3559,9 @@ static void snapshot_refaults(struct mem_cgroup *target_memcg, pg_data_t *pgdat)
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target_lruvec = mem_cgroup_lruvec(target_memcg, pgdat);
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refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE_ANON);
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target_lruvec->refaults[0] = refaults;
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target_lruvec->refaults[WORKINGSET_ANON] = refaults;
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refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE_FILE);
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target_lruvec->refaults[1] = refaults;
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target_lruvec->refaults[WORKINGSET_FILE] = refaults;
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}
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/*
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