Land b_smallfix onto HEAD (20040428_2142)

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

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index 9f1987c..35676f2 100644 (file)
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -161,14 +161,6 @@ static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 
 }
 
-#if 0
-static int ll_rd_path(char *page, char **start, off_t off, int count, int *eof,
-                      void *data)
-{
-        return 0;
-}
-#endif
-
 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
                         int *eof, void *data)
 {
@@ -222,6 +214,41 @@ static int ll_wr_read_ahead(struct file *file, const char *buffer,
         RETURN(count);
 }
 
+static int ll_rd_max_read_ahead_mb(char *page, char **start, off_t off, 
+                                   int count, int *eof, void *data)
+{
+        struct super_block *sb = data;
+        struct ll_sb_info *sbi = ll_s2sbi(sb);
+        unsigned val;
+
+        spin_lock(&sbi->ll_lock);
+        val = (sbi->ll_max_read_ahead_pages << PAGE_CACHE_SHIFT) >> 20;
+        spin_unlock(&sbi->ll_lock);
+
+        return snprintf(page, count, "%u\n", val);
+}
+
+static int ll_wr_max_read_ahead_mb(struct file *file, const char *buffer,
+                                   unsigned long count, void *data)
+{
+        struct super_block *sb = data;
+        struct ll_sb_info *sbi = ll_s2sbi(sb);
+        int val, rc;
+
+        rc = lprocfs_write_helper(buffer, count, &val);
+        if (rc)
+                return rc;
+
+        if (val < 0 || val > (num_physpages << PAGE_SHIFT) >> 20)
+                return -ERANGE;
+
+        spin_lock(&sbi->ll_lock);
+        sbi->ll_max_read_ahead_pages = (val << 20) >> PAGE_CACHE_SHIFT;
+        spin_unlock(&sbi->ll_lock);
+
+        return count;
+}
+
 static struct lprocfs_vars lprocfs_obd_vars[] = {
         { "uuid",         ll_rd_sb_uuid,          0, 0 },
         //{ "mntpt_path",   ll_rd_path,             0, 0 },
@@ -234,6 +261,8 @@ static struct lprocfs_vars lprocfs_obd_vars[] = {
         { "filesfree",    ll_rd_filesfree,        0, 0 },
         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
         { "read_ahead",   ll_rd_read_ahead, ll_wr_read_ahead, 0 },
+        { "max_read_ahead_mb",   ll_rd_max_read_ahead_mb, 
+                                 ll_wr_max_read_ahead_mb, 0 },
         { 0 }
 };
 
@@ -463,7 +492,7 @@ static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
                 return 0;
         }
 
-        spin_lock(&sbi->ll_pglist_lock);
+        spin_lock(&sbi->ll_lock);
 
         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
         if (llap != NULL)  {
@@ -486,7 +515,7 @@ static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
                         seq_puts(seq, "]\n");
         }
 
-        spin_unlock(&sbi->ll_pglist_lock);
+        spin_unlock(&sbi->ll_lock);
 
         return 0;
 }
@@ -516,14 +545,14 @@ static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v,
         /* we've just displayed the llap that is after us in the list.
          * we advance to a position beyond it, returning null if there
          * isn't another llap in the list beyond that new position. */
-        spin_lock(&sbi->ll_pglist_lock);
+        spin_lock(&sbi->ll_lock);
         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
         list_del_init(&dummy_llap->llap_proc_item);
         if (llap) {
                 list_add(&dummy_llap->llap_proc_item, &llap->llap_proc_item);
                 llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
         }
-        spin_unlock(&sbi->ll_pglist_lock);
+        spin_unlock(&sbi->ll_lock);
 
         ++*pos;
         if (llap == NULL) {
@@ -578,9 +607,9 @@ static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file)
         seq = file->private_data;
         seq->private = llap;
 
-        spin_lock(&sbi->ll_pglist_lock);
+        spin_lock(&sbi->ll_lock);
         list_add(&llap->llap_proc_item, &sbi->ll_pglist);
-        spin_unlock(&sbi->ll_pglist_lock);
+        spin_unlock(&sbi->ll_lock);
 
         return 0;
 }
@@ -592,10 +621,10 @@ static int llite_dump_pgcache_seq_release(struct inode *inode,
         struct ll_async_page *llap = seq->private;
         struct ll_sb_info *sbi = llap->llap_cookie;
 
-        spin_lock(&sbi->ll_pglist_lock);
+        spin_lock(&sbi->ll_lock);
         if (!list_empty(&llap->llap_proc_item))
                 list_del_init(&llap->llap_proc_item);
-        spin_unlock(&sbi->ll_pglist_lock);
+        spin_unlock(&sbi->ll_lock);
         OBD_FREE(llap, sizeof(*llap));
 
         return seq_release(inode, file);