Changeset ca212a51 in mainline

Timestamp:

2025-07-11T20:13:38Z (12 days ago)

Author:

Miroslav Cimerman <mc@…>

Children:

a0abd46

Parents:

b127da2f

Message:

hr: RAID 0, 5: init strip size to closest (down) pow of 2

Location:

uspace/srv/bd/hr

Files:

• raid0.c (modified) (1 diff)
• raid5.c (modified) (1 diff)
• util.c (modified) (1 diff)
• util.h (modified) (1 diff)

uspace/srv/bd/hr/raid0.c

@@ -123 +123 @@
         vol->data_blkno -= vol->meta_ops->get_size() * vol->extent_no;
 
-        vol->strip_size = HR_STRIP_SIZE;
+        vol->strip_size = hr_closest_pow2(HR_STRIP_SIZE / vol->extent_no);
 
         return EOK;

uspace/srv/bd/hr/raid5.c

@@ -131 +131 @@
         vol->data_blkno = single_sz * (vol->extent_no - 1);
 
-        vol->strip_size = HR_STRIP_SIZE;
+        vol->strip_size = hr_closest_pow2(HR_STRIP_SIZE / (vol->extent_no - 1));
 
         if (vol->level == HR_LVL_4)

uspace/srv/bd/hr/util.c

@@ -1254 +1254 @@
 }
 
+uint32_t hr_closest_pow2(uint32_t n)
+{
+        if (n == 0)
+                return 0;
+
+        n |= (n >> 1);
+        n |= (n >> 2);
+        n |= (n >> 4);
+        n |= (n >> 8);
+        n |= (n >> 16);
+        return n - (n >> 1);
+}
+
 /** @}
  */

uspace/srv/bd/hr/util.h

@@ -111 +111 @@
 extern errno_t hr_sync_extents(hr_volume_t *);
 extern errno_t hr_init_rebuild(hr_volume_t *, size_t *);
+extern uint32_t hr_closest_pow2(uint32_t);
 
 #endif