When converting a large linear device to mirror with --stripes parameter
in lvconvert command, it will report the following error:
ioctl/libdm-iface.c:1895 device-mapper: reload ioctl on (254:0)
failed: Invalid argument
and the related kernel messages:
kernel: [ 2290.698171] device-mapper: dirty region log: log device 254:1
too small: need 7078912 bytes
kernel: [ 2290.698248] device-mapper: table: 254:0: mirror: Error
creating mirror dirty log
kernel: [ 2290.698251] device-mapper: ioctl: error adding target to table
Steps to reproduce this problem
~$:pvs
PV VG Fmt Attr PSize PFree
/dev/loop0 vg lvm2 a-- 10.00t 10.00t
/dev/loop1 vg lvm2 a-- 10.00t 10.00t
/dev/loop2 vg lvm2 a-- 10.00t 10.00t
/dev/loop3 lvm2 --- 10.00t 10.00t
/dev/loop4 lvm2 --- 10.00t 10.00t
/dev/loop5 lvm2 --- 10.00t 10.00t
~$:lvcreate -nlv -L27T vg
Logical volume "lv" created.
~$:vgextend vg /dev/loop[3-5]
Volume group "vg" successfully extended
~$:lvconvert --type mirror --mirrors 1 --stripes 3 -I256 /dev/vg/lv
/dev/loop3 /dev/loop4 /dev/loop5
device-mapper: reload ioctl on (254:0) failed: Invalid argument
Failed to lock logical volume vg/lv.
~$: lvs
WARNING: Reading VG vg from disk because lvmetad metadata is invalid.
LV VG Attr LSize Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
lv vg -wi-a----- 27.00t
lv_mlog vg -wi-a----- 4.00m
~$: pvs
PV VG Fmt Attr PSize PFree
/dev/loop0 vg lvm2 a-- 10.00t 0
/dev/loop1 vg lvm2 a-- 10.00t 0
/dev/loop2 vg lvm2 a-- 10.00t 3.00t
/dev/loop3 vg lvm2 a-- 10.00t 10.00t
/dev/loop4 vg lvm2 a-- 10.00t 10.00t
/dev/loop5 vg lvm2 a-- 10.00t 10.00t
Analysis: In kernel space the required log size depends on the whole
target device size.But in user space, the log size is calculated from
the whole target devices size divided by allocation area number, which
leads to the mismatch here.
Signed-off-by: Lidong Zhong <lidong.zhong@xxxxxxxx>
---
lib/metadata/lv_manip.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c
index 7e66afd9c..e8d67c79b 100644
--- a/lib/metadata/lv_manip.c
+++ b/lib/metadata/lv_manip.c
@@ -3730,8 +3730,7 @@ static struct alloc_handle *_alloc_init(struct
cmd_context *cmd,
} else {
ah->log_area_count = metadata_area_count;
ah->log_len = !metadata_area_count ? 0 :
- _mirror_log_extents(ah->region_size, extent_size,
- (existing_extents + new_extents) / ah->area_multiple);
+ _mirror_log_extents(ah->region_size, extent_size, existing_extents +
new_extents);
}
if (total_extents || existing_extents)
--
2.26.2
_______________________________________________
linux-lvm mailing list
linux-lvm@xxxxxxxxxx
https://listman.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
