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Message-Id: <1459356495-2794775-42-git-send-email-green@linuxhacker.ru>
Date: Wed, 30 Mar 2016 12:48:13 -0400
From: green@...uxhacker.ru
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
devel@...verdev.osuosl.org,
Andreas Dilger <andreas.dilger@...el.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Lustre Development List <lustre-devel@...ts.lustre.org>,
Jinshan Xiong <jinshan.xiong@...el.com>,
Oleg Drokin <green@...uxhacker.ru>
Subject: [PATCH 41/43] staging/lustre/ldlm: ELC picks locks in a safer policy
From: Jinshan Xiong <jinshan.xiong@...el.com>
Change the policy of ELC to pick locks that have no dirty pages,
no page in writeback state, and no locked pages.
Signed-off-by: Jinshan Xiong <jinshan.xiong@...el.com>
Reviewed-on: http://review.whamcloud.com/9175
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4300
Reviewed-by: Andreas Dilger <andreas.dilger@...el.com>
Reviewed-by: Bobi Jam <bobijam@...il.com>
Signed-off-by: Oleg Drokin <green@...uxhacker.ru>
---
drivers/staging/lustre/lustre/include/lustre_dlm.h | 13 ++++++----
drivers/staging/lustre/lustre/ldlm/ldlm_request.c | 28 +++++++++++++++-------
drivers/staging/lustre/lustre/mdc/mdc_request.c | 4 ++--
drivers/staging/lustre/lustre/osc/osc_lock.c | 4 +++-
drivers/staging/lustre/lustre/osc/osc_request.c | 19 ++++++---------
5 files changed, 39 insertions(+), 29 deletions(-)
diff --git a/drivers/staging/lustre/lustre/include/lustre_dlm.h b/drivers/staging/lustre/lustre/include/lustre_dlm.h
index b1abdc2..9cade14 100644
--- a/drivers/staging/lustre/lustre/include/lustre_dlm.h
+++ b/drivers/staging/lustre/lustre/include/lustre_dlm.h
@@ -270,7 +270,7 @@ struct ldlm_pool {
struct completion pl_kobj_unregister;
};
-typedef int (*ldlm_cancel_for_recovery)(struct ldlm_lock *lock);
+typedef int (*ldlm_cancel_cbt)(struct ldlm_lock *lock);
/**
* LVB operations.
@@ -447,8 +447,11 @@ struct ldlm_namespace {
/** Limit of parallel AST RPC count. */
unsigned ns_max_parallel_ast;
- /** Callback to cancel locks before replaying it during recovery. */
- ldlm_cancel_for_recovery ns_cancel_for_recovery;
+ /**
+ * Callback to check if a lock is good to be canceled by ELC or
+ * during recovery.
+ */
+ ldlm_cancel_cbt ns_cancel;
/** LDLM lock stats */
struct lprocfs_stats *ns_stats;
@@ -480,9 +483,9 @@ static inline int ns_connect_lru_resize(struct ldlm_namespace *ns)
}
static inline void ns_register_cancel(struct ldlm_namespace *ns,
- ldlm_cancel_for_recovery arg)
+ ldlm_cancel_cbt arg)
{
- ns->ns_cancel_for_recovery = arg;
+ ns->ns_cancel = arg;
}
struct ldlm_lock;
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_request.c b/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
index 42925ac..2f12194 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
@@ -1137,7 +1137,6 @@ static ldlm_policy_res_t ldlm_cancel_no_wait_policy(struct ldlm_namespace *ns,
int count)
{
ldlm_policy_res_t result = LDLM_POLICY_CANCEL_LOCK;
- ldlm_cancel_for_recovery cb = ns->ns_cancel_for_recovery;
/* don't check added & count since we want to process all locks
* from unused list.
@@ -1147,7 +1146,7 @@ static ldlm_policy_res_t ldlm_cancel_no_wait_policy(struct ldlm_namespace *ns,
switch (lock->l_resource->lr_type) {
case LDLM_EXTENT:
case LDLM_IBITS:
- if (cb && cb(lock))
+ if (ns->ns_cancel && ns->ns_cancel(lock) != 0)
break;
default:
result = LDLM_POLICY_SKIP_LOCK;
@@ -1197,8 +1196,13 @@ static ldlm_policy_res_t ldlm_cancel_lrur_policy(struct ldlm_namespace *ns,
/* Stop when SLV is not yet come from server or lv is smaller than
* it is.
*/
- return (slv == 0 || lv < slv) ?
- LDLM_POLICY_KEEP_LOCK : LDLM_POLICY_CANCEL_LOCK;
+ if (slv == 0 || lv < slv)
+ return LDLM_POLICY_KEEP_LOCK;
+
+ if (ns->ns_cancel && ns->ns_cancel(lock) == 0)
+ return LDLM_POLICY_KEEP_LOCK;
+
+ return LDLM_POLICY_CANCEL_LOCK;
}
/**
@@ -1236,11 +1240,17 @@ static ldlm_policy_res_t ldlm_cancel_aged_policy(struct ldlm_namespace *ns,
int unused, int added,
int count)
{
- /* Stop LRU processing if young lock is found and we reach past count */
- return ((added >= count) &&
- time_before(cfs_time_current(),
- cfs_time_add(lock->l_last_used, ns->ns_max_age))) ?
- LDLM_POLICY_KEEP_LOCK : LDLM_POLICY_CANCEL_LOCK;
+ if (added >= count)
+ return LDLM_POLICY_KEEP_LOCK;
+
+ if (time_before(cfs_time_current(),
+ cfs_time_add(lock->l_last_used, ns->ns_max_age)))
+ return LDLM_POLICY_KEEP_LOCK;
+
+ if (ns->ns_cancel && ns->ns_cancel(lock) == 0)
+ return LDLM_POLICY_KEEP_LOCK;
+
+ return LDLM_POLICY_CANCEL_LOCK;
}
/**
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 55dd8ef..98b27f1 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -2249,7 +2249,7 @@ static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
* recovery, non zero value will be return if the lock can be canceled,
* or zero returned for not
*/
-static int mdc_cancel_for_recovery(struct ldlm_lock *lock)
+static int mdc_cancel_weight(struct ldlm_lock *lock)
{
if (lock->l_resource->lr_type != LDLM_IBITS)
return 0;
@@ -2331,7 +2331,7 @@ static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
sptlrpc_lprocfs_cliobd_attach(obd);
ptlrpc_lprocfs_register_obd(obd);
- ns_register_cancel(obd->obd_namespace, mdc_cancel_for_recovery);
+ ns_register_cancel(obd->obd_namespace, mdc_cancel_weight);
obd->obd_namespace->ns_lvbo = &inode_lvbo;
diff --git a/drivers/staging/lustre/lustre/osc/osc_lock.c b/drivers/staging/lustre/lustre/osc/osc_lock.c
index 68c5013..49dfe9f 100644
--- a/drivers/staging/lustre/lustre/osc/osc_lock.c
+++ b/drivers/staging/lustre/lustre/osc/osc_lock.c
@@ -635,7 +635,9 @@ static int weigh_cb(const struct lu_env *env, struct cl_io *io,
{
struct cl_page *page = ops->ops_cl.cpl_page;
- if (cl_page_is_vmlocked(env, page)) {
+ if (cl_page_is_vmlocked(env, page) ||
+ PageDirty(page->cp_vmpage) || PageWriteback(page->cp_vmpage)
+ ) {
(*(unsigned long *)cbdata)++;
return CLP_GANG_ABORT;
}
diff --git a/drivers/staging/lustre/lustre/osc/osc_request.c b/drivers/staging/lustre/lustre/osc/osc_request.c
index 368b997..a6dc517 100644
--- a/drivers/staging/lustre/lustre/osc/osc_request.c
+++ b/drivers/staging/lustre/lustre/osc/osc_request.c
@@ -2292,15 +2292,13 @@ no_match:
if (*flags & LDLM_FL_TEST_LOCK)
return -ENOLCK;
if (intent) {
- LIST_HEAD(cancels);
-
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_LDLM_ENQUEUE_LVB);
if (!req)
return -ENOMEM;
- rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
- if (rc) {
+ rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_ENQUEUE);
+ if (rc < 0) {
ptlrpc_request_free(req);
return rc;
}
@@ -3110,17 +3108,14 @@ static int osc_import_event(struct obd_device *obd,
* \retval zero the lock can't be canceled
* \retval other ok to cancel
*/
-static int osc_cancel_for_recovery(struct ldlm_lock *lock)
+static int osc_cancel_weight(struct ldlm_lock *lock)
{
/*
- * Cancel all unused extent lock in granted mode LCK_PR or LCK_CR.
- *
- * XXX as a future improvement, we can also cancel unused write lock
- * if it doesn't have dirty data and active mmaps.
+ * Cancel all unused and granted extent lock.
*/
if (lock->l_resource->lr_type == LDLM_EXTENT &&
- (lock->l_granted_mode == LCK_PR ||
- lock->l_granted_mode == LCK_CR) && osc_ldlm_weigh_ast(lock) == 0)
+ lock->l_granted_mode == lock->l_req_mode &&
+ osc_ldlm_weigh_ast(lock) == 0)
return 1;
return 0;
@@ -3197,7 +3192,7 @@ int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
}
INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
- ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
+ ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
return rc;
out_ptlrpcd_work:
--
2.1.0
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