Commit 8b219809 authored by Kurt Hackel's avatar Kurt Hackel Committed by Mark Fasheh
Browse files

ocfs2: purge lockres' sooner 



Immediately purge a lockress that the local node is not the master of.

Signed-off-by: default avatarKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
parent 343e26a4

fs/ocfs2/dlm/dlmthread.c

+35 −2
Original line number Diff line number Diff line
@@ -54,6 +54,8 @@ 
#include "cluster/masklog.h"



static int dlm_thread(void *data);

static void dlm_purge_lockres_now(struct dlm_ctxt *dlm,

				  struct dlm_lock_resource *lockres);



static void dlm_flush_asts(struct dlm_ctxt *dlm);
@@ -111,10 +113,23 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, 
			res->last_used = jiffies;

			list_add_tail(&res->purge, &dlm->purge_list);

			dlm->purge_count++;



			/* if this node is not the owner, there is

			 * no way to keep track of who the owner could be.

			 * unhash it to avoid serious problems. */

			if (res->owner != dlm->node_num) {

				mlog(0, "%s:%.*s: doing immediate "

				     "purge of lockres owned by %u\n",

				     dlm->name, res->lockname.len,

				     res->lockname.name, res->owner);



				dlm_purge_lockres_now(dlm, res);

			}

		}

	} else if (!list_empty(&res->purge)) {

		mlog(0, "removing lockres %.*s from purge list\n",

		     res->lockname.len, res->lockname.name);

		mlog(0, "removing lockres %.*s from purge list, "

		     "owner=%u\n", res->lockname.len, res->lockname.name,

		     res->owner);



		list_del_init(&res->purge);

		dlm->purge_count--;
@@ -180,6 +195,24 @@ void dlm_purge_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *lockres) 
	__dlm_unhash_lockres(lockres);

}



/* make an unused lockres go away immediately.

 * as soon as the dlm spinlock is dropped, this lockres

 * will not be found. kfree still happens on last put. */

static void dlm_purge_lockres_now(struct dlm_ctxt *dlm,

				  struct dlm_lock_resource *lockres)

{

	assert_spin_locked(&dlm->spinlock);

	assert_spin_locked(&lockres->spinlock);



	BUG_ON(!__dlm_lockres_unused(lockres));



	if (!list_empty(&lockres->purge)) {

		list_del_init(&lockres->purge);

		dlm->purge_count--;

	}

	__dlm_unhash_lockres(lockres);

}



static void dlm_run_purge_list(struct dlm_ctxt *dlm,

			       int purge_now)

{