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dlm: Switch to using wait_event() 

We saw an issue in a production server on a customer deployment where
DLM 4.0.7 gets "stuck" and unable to join new lockspaces.

There is no useful response for the dlm in do_event() if
wait_event_interruptible() is interrupted, so switch to
wait_event().

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Ross Lagerwall 2020-04-29 13:15:41 +01:00 committed by David Teigland
parent 90db4f8be3
commit f084a4f4a1
1 changed files with 4 additions and 14 deletions
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18
fs/dlm/lockspace.c
View File

@ -197,8 +197,6 @@ static struct kset *dlm_kset;
static int do_uevent(struct dlm_ls *ls, int in)
{
int error;
if (in)
kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE);
else
@ -209,20 +207,12 @@ static int do_uevent(struct dlm_ls *ls, int in)
/* dlm_controld will see the uevent, do the necessary group management
and then write to sysfs to wake us */
error = wait_event_interruptible(ls->ls_uevent_wait,
test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
wait_event(ls->ls_uevent_wait,
test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
log_rinfo(ls, "group event done %d %d", error, ls->ls_uevent_result);
log_rinfo(ls, "group event done %d", ls->ls_uevent_result);
if (error)
goto out;
error = ls->ls_uevent_result;
out:
if (error)
log_error(ls, "group %s failed %d %d", in ? "join" : "leave",
error, ls->ls_uevent_result);
return error;
return ls->ls_uevent_result;
}
static int dlm_uevent(struct kset *kset, struct kobject *kobj,