From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id F131A7F62 for ; Wed, 20 Feb 2013 09:07:51 -0600 (CST) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay3.corp.sgi.com (Postfix) with ESMTP id 5FE08AC007 for ; Wed, 20 Feb 2013 07:07:48 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 1WHFG3O6aO8fCbCB for ; Wed, 20 Feb 2013 07:07:46 -0800 (PST) Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r1KF7kQp024511 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 20 Feb 2013 10:07:46 -0500 Received: from bfoster.bfoster (dhcp-189-135.bos.redhat.com [10.16.189.135]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id r1KF7je3023298 for ; Wed, 20 Feb 2013 10:07:46 -0500 From: Brian Foster Subject: [PATCH v4 4/6] xfs: xfs_dquot prealloc throttling watermarks and low free space Date: Wed, 20 Feb 2013 10:10:17 -0500 Message-Id: <1361373019-30891-5-git-send-email-bfoster@redhat.com> In-Reply-To: <1361373019-30891-1-git-send-email-bfoster@redhat.com> References: <1361373019-30891-1-git-send-email-bfoster@redhat.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Enable tracking of high and low watermarks for preallocation throttling of files under quota restrictions. These values are calculated when the quota limit is read from disk or modified and cached for later use by the throttling algorithm. The high watermark specifies when preallocation is disabled, the low watermark specifies when throttling is enabled and the low free space data structure contains precalculated low free space limits to serve as input to determine the level of throttling required. Note that the low free space data structure is based on the existing global low free space data structure with the exception of using three stages (5%, 3% and 1%) rather than five to reduce the impact of xfs_dquot memory overhead. Signed-off-by: Brian Foster --- fs/xfs/xfs_dquot.c | 41 +++++++++++++++++++++++++++++++++++++++-- fs/xfs/xfs_dquot.h | 12 ++++++++++++ fs/xfs/xfs_qm_syscalls.c | 1 + 3 files changed, 52 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index e1833b9..e3aa801 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -90,13 +90,18 @@ xfs_qm_adjust_dqlimits( { xfs_quotainfo_t *q = mp->m_quotainfo; xfs_disk_dquot_t *d = &dq->q_core; + int prealloc = 0; ASSERT(d->d_id); - if (q->qi_bsoftlimit && !d->d_blk_softlimit) + if (q->qi_bsoftlimit && !d->d_blk_softlimit) { d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit); - if (q->qi_bhardlimit && !d->d_blk_hardlimit) + prealloc = 1; + } + if (q->qi_bhardlimit && !d->d_blk_hardlimit) { d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit); + prealloc = 1; + } if (q->qi_isoftlimit && !d->d_ino_softlimit) d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit); if (q->qi_ihardlimit && !d->d_ino_hardlimit) @@ -105,6 +110,9 @@ xfs_qm_adjust_dqlimits( d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit); if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit) d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit); + + if (prealloc) + xfs_dquot_set_prealloc_limits(dq); } /* @@ -249,6 +257,32 @@ xfs_qm_init_dquot_blk( xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1); } +/* + * Initialize the dynamic speculative preallocation thresholds. The lo/hi + * watermarks correspond to the soft and hard limits by default. If a soft limit + * is not specified, we use 95% of the hard limit. + */ +void +xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp) +{ + __uint64_t space; + + dqp->q_prealloc_hi_wmark = be64_to_cpu(dqp->q_core.d_blk_hardlimit); + dqp->q_prealloc_lo_wmark = be64_to_cpu(dqp->q_core.d_blk_softlimit); + if (!dqp->q_prealloc_lo_wmark) { + dqp->q_prealloc_lo_wmark = dqp->q_prealloc_hi_wmark; + do_div(dqp->q_prealloc_lo_wmark, 100); + dqp->q_prealloc_lo_wmark *= 95; + } + + space = dqp->q_prealloc_hi_wmark; + + do_div(space, 100); + dqp->q_low_space[XFS_QLOWSP_1_PCNT] = space; + dqp->q_low_space[XFS_QLOWSP_3_PCNT] = space * 3; + dqp->q_low_space[XFS_QLOWSP_5_PCNT] = space * 5; +} + static void xfs_dquot_buf_verify( struct xfs_buf *bp) @@ -649,6 +683,9 @@ xfs_qm_dqread( dqp->q_res_icount = be64_to_cpu(ddqp->d_icount); dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount); + /* initialize the dquot speculative prealloc thresholds */ + xfs_dquot_set_prealloc_limits(dqp); + /* Mark the buf so that this will stay incore a little longer */ xfs_buf_set_ref(bp, XFS_DQUOT_REF); diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h index 69491b6..4263f33 100644 --- a/fs/xfs/xfs_dquot.h +++ b/fs/xfs/xfs_dquot.h @@ -32,6 +32,13 @@ struct xfs_mount; struct xfs_trans; +enum { + XFS_QLOWSP_1_PCNT = 0, + XFS_QLOWSP_3_PCNT, + XFS_QLOWSP_5_PCNT, + XFS_QLOWSP_MAX +}; + /* * The incore dquot structure */ @@ -51,6 +58,9 @@ typedef struct xfs_dquot { xfs_qcnt_t q_res_bcount; /* total regular nblks used+reserved */ xfs_qcnt_t q_res_icount; /* total inos allocd+reserved */ xfs_qcnt_t q_res_rtbcount;/* total realtime blks used+reserved */ + xfs_qcnt_t q_prealloc_lo_wmark;/* prealloc throttle wmark */ + xfs_qcnt_t q_prealloc_hi_wmark;/* prealloc disabled wmark */ + int64_t q_low_space[XFS_QLOWSP_MAX]; struct mutex q_qlock; /* quota lock */ struct completion q_flush; /* flush completion queue */ atomic_t q_pincount; /* dquot pin count */ @@ -153,6 +163,8 @@ extern void xfs_qm_dqput(xfs_dquot_t *); extern void xfs_dqlock2(struct xfs_dquot *, struct xfs_dquot *); +extern void xfs_dquot_set_prealloc_limits(struct xfs_dquot *); + static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp) { xfs_dqlock(dqp); diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c index cf9a340..6096eed 100644 --- a/fs/xfs/xfs_qm_syscalls.c +++ b/fs/xfs/xfs_qm_syscalls.c @@ -529,6 +529,7 @@ xfs_qm_scall_setqlim( if (hard == 0 || hard >= soft) { ddq->d_blk_hardlimit = cpu_to_be64(hard); ddq->d_blk_softlimit = cpu_to_be64(soft); + xfs_dquot_set_prealloc_limits(dqp); if (id == 0) { q->qi_bhardlimit = hard; q->qi_bsoftlimit = soft; -- 1.7.7.6 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs