* GPL HEADER END
*/
/*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2013, Intel Corporation.
* Use is subject to license terms.
*
* Author: Johann Lombardi <johann.lombardi@intel.com>
* Author: Niu Yawei <yawei.niu@intel.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
#define DEBUG_SUBSYSTEM S_LQUOTA
#include "qmt_internal.h"
struct qmt_pool_info *pool = (struct qmt_pool_info *)arg;
libcfs_debug_vmsg2(msgdata, fmt, args,
- "qmt:%s pool:%d-%s id:"LPU64" enforced:%d hard:"LPU64
- " soft:"LPU64" granted:"LPU64" time:"LPU64" qunit:"
- LPU64" edquot:%d may_rel:"LPU64" revoke:"LPU64"\n",
+ "qmt:%s pool:%d-%s id:%llu enforced:%d hard:%llu"
+ " soft:%llu granted:%llu time:%llu qunit:"
+ "%llu edquot:%d may_rel:%llu revoke:%llu\n",
pool->qpi_qmt->qmt_svname,
pool->qpi_key & 0x0000ffff,
RES_NAME(pool->qpi_key >> 16),
RETURN(rc);
}
- LQUOTA_DEBUG(lqe, "successful slv read "LPU64, *granted);
+ LQUOTA_DEBUG(lqe, "successful slv read %llu", *granted);
RETURN(0);
}
LASSERT(lqe_is_master(lqe));
LASSERT(lqe_is_locked(lqe));
- LQUOTA_DEBUG(lqe, "write slv "DFID" granted:"LPU64,
+ LQUOTA_DEBUG(lqe, "write slv "DFID" granted:%llu",
PFID(lu_object_fid(&slv_obj->do_lu)), granted);
/* never delete the entry, otherwise, it'll not be transferred
(struct dt_rec *)rec, flags, ver);
if (rc) {
LQUOTA_ERROR(lqe, "failed to update slave index "DFID" granted:"
- LPU64, PFID(lu_object_fid(&slv_obj->do_lu)),
+ "%llu", PFID(lu_object_fid(&slv_obj->do_lu)),
granted);
RETURN(rc);
}
/* the qmt still has available space */
RETURN_EXIT;
- if (lqe->lqe_qunit != pool->qpi_least_qunit)
- /* we haven't reached the minimal qunit yet, so there is
- * still hope that the rebalancing process might free up
- * some quota space */
- RETURN_EXIT;
+ /* See comment in qmt_adjust_qunit(). LU-4139 */
+ if (qmt_hard_exhausted(lqe) ||
+ pool->qpi_key >> 16 != LQUOTA_RES_DT) {
+ /* we haven't reached the minimal qunit yet so there is
+ * still hope that the rebalancing process might free
+ * up some quota space */
+ if (lqe->lqe_qunit != pool->qpi_least_qunit)
+ RETURN_EXIT;
- if (lqe->lqe_revoke_time == 0)
/* least qunit value not sent to all slaves yet */
- RETURN_EXIT;
+ if (lqe->lqe_revoke_time == 0)
+ RETURN_EXIT;
- if (lqe->lqe_may_rel != 0 &&
- cfs_time_before_64(cfs_time_shift_64(-QMT_REBA_TIMEOUT),
- lqe->lqe_revoke_time))
/* Let's give more time to slave to release space */
- RETURN_EXIT;
+ if (lqe->lqe_may_rel != 0 &&
+ cfs_time_before_64(cfs_time_shift_64(
+ -QMT_REBA_TIMEOUT),
+ lqe->lqe_revoke_time))
+ RETURN_EXIT;
+ } else {
+ if (lqe->lqe_qunit > pool->qpi_soft_least_qunit)
+ RETURN_EXIT;
+ }
/* set edquot flag */
lqe->lqe_edquot = true;
EXIT;
}
+/* Using least_qunit when over block softlimit will seriously impact the
+ * write performance, we need to do some special tweaking on that. */
+static __u64 qmt_calc_softlimit(struct lquota_entry *lqe, bool *oversoft)
+{
+ struct qmt_pool_info *pool = lqe2qpi(lqe);
+
+ LASSERT(lqe->lqe_softlimit != 0);
+ *oversoft = false;
+ /* No need to do special tweaking for inode limit */
+ if (pool->qpi_key >> 16 != LQUOTA_RES_DT)
+ return lqe->lqe_softlimit;
+
+ if (lqe->lqe_granted <= lqe->lqe_softlimit +
+ pool->qpi_soft_least_qunit) {
+ return lqe->lqe_softlimit;
+ } else if (lqe->lqe_hardlimit != 0) {
+ *oversoft = true;
+ return lqe->lqe_hardlimit;
+ } else {
+ *oversoft = true;
+ return 0;
+ }
+}
+
/*
* Try to grant more quota space back to slave.
*
slv_cnt = lqe2qpi(lqe)->qpi_slv_nr[lqe->lqe_site->lqs_qtype];
qunit = lqe->lqe_qunit;
- if (lqe->lqe_softlimit != 0)
- remaining = lqe->lqe_softlimit;
- else
+ /* See comment in qmt_adjust_qunit(). LU-4139. */
+ if (lqe->lqe_softlimit != 0) {
+ bool oversoft;
+ remaining = qmt_calc_softlimit(lqe, &oversoft);
+ if (remaining == 0)
+ remaining = lqe->lqe_granted +
+ pool->qpi_soft_least_qunit;
+ } else {
remaining = lqe->lqe_hardlimit;
+ }
if (lqe->lqe_granted >= remaining)
RETURN(0);
{
struct qmt_pool_info *pool = lqe2qpi(lqe);
int slv_cnt;
- __u64 qunit, limit;
+ __u64 qunit, limit, qunit2 = 0;
ENTRY;
LASSERT(lqe_is_locked(lqe));
* beyond the soft limit. This will impact performance, but that's the
* price of an accurate grace time management. */
if (lqe->lqe_softlimit != 0) {
- limit = lqe->lqe_softlimit;
+ bool oversoft;
+ /* As a compromise of write performance and the grace time
+ * accuracy, the block qunit size will be shrunk to
+ * qpi_soft_least_qunit when over softlimit. LU-4139. */
+ limit = qmt_calc_softlimit(lqe, &oversoft);
+ if (oversoft)
+ qunit2 = pool->qpi_soft_least_qunit;
+ if (limit == 0)
+ GOTO(done, qunit = qunit2);
} else if (lqe->lqe_hardlimit != 0) {
limit = lqe->lqe_hardlimit;
} else {
/* current qunit value still fits, let's see if we can afford to
* increase qunit now ...
* To increase qunit again, we have to be under 25% */
- while (limit >= lqe->lqe_granted + 6 * qunit * slv_cnt)
+ while (qunit && limit >= lqe->lqe_granted + 6 * qunit * slv_cnt)
qunit <<= 2;
+
+ if (!qunit) {
+ qunit = limit;
+ do_div(qunit, 2 * slv_cnt);
+ }
+
} else {
/* shrink qunit until we find a suitable value */
while (qunit > pool->qpi_least_qunit &&
qunit >>= 2;
}
+ if (qunit2 && qunit > qunit2)
+ qunit = qunit2;
+done:
if (lqe->lqe_qunit == qunit)
/* keep current qunit */
RETURN_EXIT;
- LQUOTA_DEBUG(lqe, "%s qunit to "LPU64,
+ LQUOTA_DEBUG(lqe, "%s qunit to %llu",
lqe->lqe_qunit < qunit ? "increasing" : "decreasing",
qunit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff