LU-13798 llite: parallelize direct i/o issuance

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

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index 09e6e6b..7505403 100644 (file)
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -1086,6 +1086,42 @@ static ssize_t tiny_write_store(struct kobject *kobj,
 }
 LUSTRE_RW_ATTR(tiny_write);
 
+static ssize_t parallel_dio_show(struct kobject *kobj,
+                                struct attribute *attr,
+                                char *buf)
+{
+       struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+                                             ll_kset.kobj);
+
+       return snprintf(buf, PAGE_SIZE, "%u\n",
+                      !!(sbi->ll_flags & LL_SBI_PARALLEL_DIO));
+}
+
+static ssize_t parallel_dio_store(struct kobject *kobj,
+                                 struct attribute *attr,
+                                 const char *buffer,
+                                 size_t count)
+{
+       struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+                                             ll_kset.kobj);
+       bool val;
+       int rc;
+
+       rc = kstrtobool(buffer, &val);
+       if (rc)
+               return rc;
+
+       spin_lock(&sbi->ll_lock);
+       if (val)
+               sbi->ll_flags |= LL_SBI_PARALLEL_DIO;
+       else
+               sbi->ll_flags &= ~LL_SBI_PARALLEL_DIO;
+       spin_unlock(&sbi->ll_lock);
+
+       return count;
+}
+LUSTRE_RW_ATTR(parallel_dio);
+
 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
                                               struct attribute *attr,
                                               char *buf)
@@ -1668,6 +1704,7 @@ static struct attribute *llite_attrs[] = {
        &lustre_attr_xattr_cache.attr,
        &lustre_attr_fast_read.attr,
        &lustre_attr_tiny_write.attr,
+       &lustre_attr_parallel_dio.attr,
        &lustre_attr_file_heat.attr,
        &lustre_attr_heat_decay_percentage.attr,
        &lustre_attr_heat_period_second.attr,