From: Etienne AUJAMES <eaujames@xxxxxxx>
A user can change the value of max_sectors_kb on the multipath device
and its path devices.
So when a path is deleted and then re-added, its value will not be the
same as the multipath device. In that case the IOs could be mis-sized.
On reload, this patch re-apply max_sectors_kb value of the multipath
device on its path devices.
Signed-off-by: Etienne AUJAMES <eaujames@xxxxxxx>
---
libmultipath/configure.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libmultipath/configure.c b/libmultipath/configure.c
index 4a1c28bb..639c0905 100644
--- a/libmultipath/configure.c
+++ b/libmultipath/configure.c
@@ -593,11 +593,12 @@ sysfs_set_max_sectors_kb(struct multipath *mpp,
int is_reload)
ssize_t len;
int i, j, ret, err = 0;
struct udev_device *udd;
- int max_sectors_kb;
+ int max_sectors_kb = mpp->max_sectors_kb;
- if (mpp->max_sectors_kb == MAX_SECTORS_KB_UNDEF)
+ /* by default, do not initialize max_sectors_kb on the device
*/
+ if (max_sectors_kb == MAX_SECTORS_KB_UNDEF && !is_reload)
return 0;
- max_sectors_kb = mpp->max_sectors_kb;
+ /* on reload, re-apply the user tuning on all the path devices
*/
if (is_reload) {
if (!has_dm_info(mpp) &&
dm_get_info(mpp->alias, &mpp->dmi) != 0) {
--
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