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lvconvert: reject changing number of stripes on single core

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Reject any stripe adding/removing reshape on raid4/5/6/10 because
of related MD kernel deadlock on single core systems until
we get a proper fix in MD.

Related: rhbz1443999
This commit is contained in:
Heinz Mauelshagen 2017-05-30 19:14:32 +02:00
parent c245996d70
commit 3719f4bc54
1 changed files with 12 additions and 0 deletions
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12
lib/metadata/raid_manip.c
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@ -2322,6 +2322,12 @@ static int _raid_reshape(struct logical_volume *lv,
/* Handle disk addition reshaping */
if (old_image_count < new_image_count) {
/* FIXME: remove once MD kernel rhbz1443999 got fixed. */
if (sysconf(_SC_NPROCESSORS_ONLN) < 2) {
log_error("Can't add stripes to LV %s on single core.", display_lvname(lv));
return 0;
}
if (!_raid_reshape_add_images(lv, new_segtype, yes,
old_image_count, new_image_count,
new_stripes, new_stripe_size, allocate_pvs))
@ -2329,6 +2335,12 @@ static int _raid_reshape(struct logical_volume *lv,
/* Handle disk removal reshaping */
} else if (old_image_count > new_image_count) {
/* FIXME: remove once MD kernel rhbz1443999 got fixed. */
if (sysconf(_SC_NPROCESSORS_ONLN) < 2) {
log_error("Can't remove stripes from LV %s on single core.", display_lvname(lv));
return 0;
}
if (!_raid_reshape_remove_images(lv, new_segtype, yes, force,
old_image_count, new_image_count,
new_stripes, new_stripe_size,