From 410b11a675dca827e893f07c3155691eda3b5887 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Fri, 7 Feb 2014 14:55:54 +1100 Subject: [PATCH] xfs: use tr_qm_dqalloc log reservation for dquot alloc The dquot allocation path in xfs_qm_dqread() currently uses the attribute set log reservation, which appears to be incorrect. We have reports of transaction reservation overruns with the current code. E.g., a repeated run of xfstests test generic/270 on a 512b block size fs occassionally produces the following in dmesg: XFS (sdN): xlog_write: reservation summary: trans type = QM_DQALLOC (30) unit res = 7080 bytes current res = -632 bytes total reg = 0 bytes (o/flow = 0 bytes) ophdrs = 0 (ophdr space = 0 bytes) ophdr + reg = 0 bytes num regions = 0 XFS (sdN): xlog_write: reservation ran out. Need to up reservation The dquot allocation case should consist of a write reservation (i.e., we are allocating a range of the internal quota file) plus the size of the actual dquots. We already have a log reservation definition for this operation (tr_qm_dqalloc). Use it in xfs_qm_dqread() and update the log reservation calculation function to use the write res. calculation function rather than reading the assumed to be pre-calculated value directly. Signed-off-by: Brian Foster Reviewed-by: Jie Liu Reviewed-by: Ben Myers Signed-off-by: Dave Chinner --- fs/xfs/xfs_dquot.c | 2 +- fs/xfs/xfs_trans_resv.c | 5 ++--- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index 7aeb4c895b32..868b19f096bf 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -615,7 +615,7 @@ xfs_qm_dqread( if (flags & XFS_QMOPT_DQALLOC) { tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC); - error = xfs_trans_reserve(tp, &M_RES(mp)->tr_attrsetm, + error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_dqalloc, XFS_QM_DQALLOC_SPACE_RES(mp), 0); if (error) goto error1; diff --git a/fs/xfs/xfs_trans_resv.c b/fs/xfs/xfs_trans_resv.c index c9d2708dd74d..8515b0449dc8 100644 --- a/fs/xfs/xfs_trans_resv.c +++ b/fs/xfs/xfs_trans_resv.c @@ -644,15 +644,14 @@ xfs_calc_qm_setqlim_reservation( /* * Allocating quota on disk if needed. - * the write transaction log space: M_RES(mp)->tr_write.tr_logres + * the write transaction log space for quota file extent allocation * the unit of quota allocation: one system block size */ STATIC uint xfs_calc_qm_dqalloc_reservation( struct xfs_mount *mp) { - ASSERT(M_RES(mp)->tr_write.tr_logres); - return M_RES(mp)->tr_write.tr_logres + + return xfs_calc_write_reservation(mp) + xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1); }