LU-16338 readahead: add stats for read-ahead page count

[fs/lustre-release.git] / lustre / llite / rw.c

diff --git a/lustre/llite/rw.c b/lustre/llite/rw.c
index 66496e6..49f174f 100644 (file)
--- a/lustre/llite/rw.c
+++ b/lustre/llite/rw.c
@@ -148,9 +148,18 @@ static inline bool ll_readahead_enabled(struct ll_sb_info *sbi)
 void ll_ra_stats_inc(struct inode *inode, enum ra_stat which)
 {
        struct ll_sb_info *sbi = ll_i2sbi(inode);
+
        ll_ra_stats_inc_sbi(sbi, which);
 }
 
+void ll_ra_stats_add(struct inode *inode, enum ra_stat which, long count)
+{
+       struct ll_sb_info *sbi = ll_i2sbi(inode);
+
+       LASSERTF(which < _NR_RA_STAT, "which: %u\n", which);
+       lprocfs_counter_add(sbi->ll_ra_stats, which, count);
+}
+
 #define RAS_CDEBUG(ras) \
        CDEBUG(D_READA,                                                      \
               "lre %llu cr %lu cb %llu wsi %lu wp %lu nra %lu rpc %lu "     \
@@ -524,6 +533,10 @@ ll_read_ahead_pages(const struct lu_env *env, struct cl_io *io,
 
        cl_read_ahead_release(env, &ra);
 
+       if (count)
+               ll_ra_stats_add(vvp_object_inode(io->ci_obj),
+                               RA_STAT_READAHEAD_PAGES, count);
+
        return count;
 }