staging/lustre/llite: move llite/max_read_ahead_whole_mb to sysfs
Move max_read_ahead_whole_mb file from /proc/fs/lustre/llite/* to /sys/fs/lustre/llite/*/ Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>hifive-unleashed-5.1
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0e6c5a219a
commit
ec46923586
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@ -312,10 +312,12 @@ static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
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}
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LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
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static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *unused)
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static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
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struct attribute *attr,
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char *buf)
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{
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struct super_block *sb = m->private;
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struct ll_sb_info *sbi = ll_s2sbi(sb);
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struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
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ll_kobj);
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long pages_number;
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int mult;
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@ -324,26 +326,26 @@ static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *unused)
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spin_unlock(&sbi->ll_lock);
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mult = 1 << (20 - PAGE_CACHE_SHIFT);
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return lprocfs_seq_read_frac_helper(m, pages_number, mult);
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return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
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}
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static ssize_t ll_max_read_ahead_whole_mb_seq_write(struct file *file,
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const char __user *buffer,
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size_t count, loff_t *off)
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static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer,
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size_t count)
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{
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struct super_block *sb = ((struct seq_file *)file->private_data)->private;
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struct ll_sb_info *sbi = ll_s2sbi(sb);
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int mult, rc, pages_number;
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struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
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ll_kobj);
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int rc;
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unsigned long pages_number;
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mult = 1 << (20 - PAGE_CACHE_SHIFT);
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rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
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rc = kstrtoul(buffer, 10, &pages_number);
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if (rc)
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return rc;
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/* Cap this at the current max readahead window size, the readahead
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* algorithm does this anyway so it's pointless to set it larger. */
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if (pages_number < 0 ||
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pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
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if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
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CERROR("can't set max_read_ahead_whole_mb more than max_read_ahead_per_file_mb: %lu\n",
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sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_CACHE_SHIFT));
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return -ERANGE;
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@ -355,7 +357,7 @@ static ssize_t ll_max_read_ahead_whole_mb_seq_write(struct file *file,
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return count;
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}
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LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
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LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
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static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
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{
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@ -847,7 +849,6 @@ static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
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/* { "mntpt_path", ll_rd_path, 0, 0 }, */
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{ "site", &ll_site_stats_fops, NULL, 0 },
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/* { "filegroups", lprocfs_rd_filegroups, 0, 0 }, */
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{ "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, NULL },
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{ "max_cached_mb", &ll_max_cached_mb_fops, NULL },
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{ "checksum_pages", &ll_checksum_fops, NULL },
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{ "max_rw_chunk", &ll_max_rw_chunk_fops, NULL },
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@ -881,6 +882,7 @@ static struct attribute *llite_attrs[] = {
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&lustre_attr_uuid.attr,
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&lustre_attr_max_read_ahead_mb.attr,
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&lustre_attr_max_read_ahead_per_file_mb.attr,
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&lustre_attr_max_read_ahead_whole_mb.attr,
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NULL,
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};
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@ -110,3 +110,10 @@ Date: May 2015
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Contact: "Oleg Drokin" <oleg.drokin@intel.com>
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Description:
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Sets maximum number of megabytes to read-ahead for a single file
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What: /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_whole_mb
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Date: May 2015
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Contact: "Oleg Drokin" <oleg.drokin@intel.com>
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Description:
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For small reads, how many megabytes to actually request from
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the server as initial read-ahead.
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