diff options
| -rw-r--r-- | fs/xfs/libxfs/xfs_log_rlimit.c | 12 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_refcount.c | 9 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_trans_resv.c | 130 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_trans_resv.h | 4 |
4 files changed, 138 insertions, 17 deletions
diff --git a/fs/xfs/libxfs/xfs_log_rlimit.c b/fs/xfs/libxfs/xfs_log_rlimit.c index 60fff8c6716f..9975b93a7412 100644 --- a/fs/xfs/libxfs/xfs_log_rlimit.c +++ b/fs/xfs/libxfs/xfs_log_rlimit.c @@ -80,6 +80,18 @@ xfs_log_calc_trans_resv_for_minlogblocks( resv->tr_qm_dqalloc.tr_logcount = XFS_WRITE_LOG_COUNT; } + /* + * In the early days of reflink, we did not use deferred refcount + * update log items, so log reservations must be recomputed using the + * old calculations. + */ + resv->tr_write.tr_logres = + xfs_calc_write_reservation_minlogsize(mp); + resv->tr_itruncate.tr_logres = + xfs_calc_itruncate_reservation_minlogsize(mp); + resv->tr_qm_dqalloc.tr_logres = + xfs_calc_qm_dqalloc_reservation_minlogsize(mp); + /* Put everything back the way it was. This goes at the end. */ mp->m_rmap_maxlevels = rmap_maxlevels; } diff --git a/fs/xfs/libxfs/xfs_refcount.c b/fs/xfs/libxfs/xfs_refcount.c index a07ebaecba73..e53544d52ee2 100644 --- a/fs/xfs/libxfs/xfs_refcount.c +++ b/fs/xfs/libxfs/xfs_refcount.c @@ -886,8 +886,13 @@ xfs_refcount_still_have_space( { unsigned long overhead; - overhead = cur->bc_ag.refc.shape_changes * - xfs_allocfree_log_count(cur->bc_mp, 1); + /* + * Worst case estimate: full splits of the free space and rmap btrees + * to handle each of the shape changes to the refcount btree. + */ + overhead = xfs_allocfree_log_count(cur->bc_mp, + cur->bc_ag.refc.shape_changes); + overhead += cur->bc_mp->m_refc_maxlevels; overhead *= cur->bc_mp->m_sb.sb_blocksize; /* diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c index 60be82cd491b..ab688929d884 100644 --- a/fs/xfs/libxfs/xfs_trans_resv.c +++ b/fs/xfs/libxfs/xfs_trans_resv.c @@ -56,8 +56,7 @@ xfs_calc_buf_res( * Per-extent log reservation for the btree changes involved in freeing or * allocating an extent. In classic XFS there were two trees that will be * modified (bnobt + cntbt). With rmap enabled, there are three trees - * (rmapbt). With reflink, there are four trees (refcountbt). The number of - * blocks reserved is based on the formula: + * (rmapbt). The number of blocks reserved is based on the formula: * * num trees * ((2 blocks/level * max depth) - 1) * @@ -73,13 +72,24 @@ xfs_allocfree_log_count( blocks = num_ops * 2 * (2 * mp->m_alloc_maxlevels - 1); if (xfs_has_rmapbt(mp)) blocks += num_ops * (2 * mp->m_rmap_maxlevels - 1); - if (xfs_has_reflink(mp)) - blocks += num_ops * (2 * mp->m_refc_maxlevels - 1); return blocks; } /* + * Per-extent log reservation for refcount btree changes. These are never done + * in the same transaction as an allocation or a free, so we compute them + * separately. + */ +static unsigned int +xfs_refcountbt_block_count( + struct xfs_mount *mp, + unsigned int num_ops) +{ + return num_ops * (2 * mp->m_refc_maxlevels - 1); +} + +/* * Logging inodes is really tricksy. They are logged in memory format, * which means that what we write into the log doesn't directly translate into * the amount of space they use on disk. @@ -233,6 +243,28 @@ xfs_rtalloc_log_count( * register overflow from temporaries in the calculations. */ +/* + * Compute the log reservation required to handle the refcount update + * transaction. Refcount updates are always done via deferred log items. + * + * This is calculated as: + * Data device refcount updates (t1): + * the agfs of the ags containing the blocks: nr_ops * sector size + * the refcount btrees: nr_ops * 1 trees * (2 * max depth - 1) * block size + */ +static unsigned int +xfs_calc_refcountbt_reservation( + struct xfs_mount *mp, + unsigned int nr_ops) +{ + unsigned int blksz = XFS_FSB_TO_B(mp, 1); + + if (!xfs_has_reflink(mp)) + return 0; + + return xfs_calc_buf_res(nr_ops, mp->m_sb.sb_sectsize) + + xfs_calc_buf_res(xfs_refcountbt_block_count(mp, nr_ops), blksz); +} /* * In a write transaction we can allocate a maximum of 2 @@ -255,12 +287,14 @@ xfs_rtalloc_log_count( * the agfls of the ags containing the blocks: 2 * sector size * the super block free block counter: sector size * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size + * And any refcount updates that happen in a separate transaction (t4). */ STATIC uint xfs_calc_write_reservation( - struct xfs_mount *mp) + struct xfs_mount *mp, + bool for_minlogsize) { - unsigned int t1, t2, t3; + unsigned int t1, t2, t3, t4; unsigned int blksz = XFS_FSB_TO_B(mp, 1); t1 = xfs_calc_inode_res(mp, 1) + @@ -282,7 +316,36 @@ xfs_calc_write_reservation( t3 = xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + xfs_calc_buf_res(xfs_allocfree_log_count(mp, 2), blksz); - return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3); + /* + * In the early days of reflink, we included enough reservation to log + * two refcountbt splits for each transaction. The codebase runs + * refcountbt updates in separate transactions now, so to compute the + * minimum log size, add the refcountbtree splits back to t1 and t3 and + * do not account them separately as t4. Reflink did not support + * realtime when the reservations were established, so no adjustment to + * t2 is needed. + */ + if (for_minlogsize) { + unsigned int adj = 0; + + if (xfs_has_reflink(mp)) + adj = xfs_calc_buf_res( + xfs_refcountbt_block_count(mp, 2), + blksz); + t1 += adj; + t3 += adj; + return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3); + } + + t4 = xfs_calc_refcountbt_reservation(mp, 1); + return XFS_DQUOT_LOGRES(mp) + max(t4, max3(t1, t2, t3)); +} + +unsigned int +xfs_calc_write_reservation_minlogsize( + struct xfs_mount *mp) +{ + return xfs_calc_write_reservation(mp, true); } /* @@ -304,12 +367,14 @@ xfs_calc_write_reservation( * the realtime summary: 2 exts * 1 block * worst case split in allocation btrees per extent assuming 2 extents: * 2 exts * 2 trees * (2 * max depth - 1) * block size + * And any refcount updates that happen in a separate transaction (t4). */ STATIC uint xfs_calc_itruncate_reservation( - struct xfs_mount *mp) + struct xfs_mount *mp, + bool for_minlogsize) { - unsigned int t1, t2, t3; + unsigned int t1, t2, t3, t4; unsigned int blksz = XFS_FSB_TO_B(mp, 1); t1 = xfs_calc_inode_res(mp, 1) + @@ -326,7 +391,33 @@ xfs_calc_itruncate_reservation( t3 = 0; } - return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3); + /* + * In the early days of reflink, we included enough reservation to log + * four refcountbt splits in the same transaction as bnobt/cntbt + * updates. The codebase runs refcountbt updates in separate + * transactions now, so to compute the minimum log size, add the + * refcount btree splits back here and do not compute them separately + * as t4. Reflink did not support realtime when the reservations were + * established, so do not adjust t3. + */ + if (for_minlogsize) { + if (xfs_has_reflink(mp)) + t2 += xfs_calc_buf_res( + xfs_refcountbt_block_count(mp, 4), + blksz); + + return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3); + } + + t4 = xfs_calc_refcountbt_reservation(mp, 2); + return XFS_DQUOT_LOGRES(mp) + max(t4, max3(t1, t2, t3)); +} + +unsigned int +xfs_calc_itruncate_reservation_minlogsize( + struct xfs_mount *mp) +{ + return xfs_calc_itruncate_reservation(mp, true); } /* @@ -792,13 +883,21 @@ xfs_calc_qm_setqlim_reservation(void) */ STATIC uint xfs_calc_qm_dqalloc_reservation( - struct xfs_mount *mp) + struct xfs_mount *mp, + bool for_minlogsize) { - return xfs_calc_write_reservation(mp) + + return xfs_calc_write_reservation(mp, for_minlogsize) + xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1); } +unsigned int +xfs_calc_qm_dqalloc_reservation_minlogsize( + struct xfs_mount *mp) +{ + return xfs_calc_qm_dqalloc_reservation(mp, true); +} + /* * Syncing the incore super block changes to disk. * the super block to reflect the changes: sector size @@ -821,11 +920,11 @@ xfs_trans_resv_calc( * The following transactions are logged in physical format and * require a permanent reservation on space. */ - resp->tr_write.tr_logres = xfs_calc_write_reservation(mp); + resp->tr_write.tr_logres = xfs_calc_write_reservation(mp, false); resp->tr_write.tr_logcount = XFS_WRITE_LOG_COUNT; resp->tr_write.tr_logflags |= XFS_TRANS_PERM_LOG_RES; - resp->tr_itruncate.tr_logres = xfs_calc_itruncate_reservation(mp); + resp->tr_itruncate.tr_logres = xfs_calc_itruncate_reservation(mp, false); resp->tr_itruncate.tr_logcount = XFS_ITRUNCATE_LOG_COUNT; resp->tr_itruncate.tr_logflags |= XFS_TRANS_PERM_LOG_RES; @@ -882,7 +981,8 @@ xfs_trans_resv_calc( resp->tr_growrtalloc.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT; resp->tr_growrtalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES; - resp->tr_qm_dqalloc.tr_logres = xfs_calc_qm_dqalloc_reservation(mp); + resp->tr_qm_dqalloc.tr_logres = xfs_calc_qm_dqalloc_reservation(mp, + false); resp->tr_qm_dqalloc.tr_logcount = XFS_WRITE_LOG_COUNT; resp->tr_qm_dqalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES; diff --git a/fs/xfs/libxfs/xfs_trans_resv.h b/fs/xfs/libxfs/xfs_trans_resv.h index fa330e646dc5..22b99042127a 100644 --- a/fs/xfs/libxfs/xfs_trans_resv.h +++ b/fs/xfs/libxfs/xfs_trans_resv.h @@ -98,4 +98,8 @@ struct xfs_trans_resv { void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp); uint xfs_allocfree_log_count(struct xfs_mount *mp, uint num_ops); +unsigned int xfs_calc_itruncate_reservation_minlogsize(struct xfs_mount *mp); +unsigned int xfs_calc_write_reservation_minlogsize(struct xfs_mount *mp); +unsigned int xfs_calc_qm_dqalloc_reservation_minlogsize(struct xfs_mount *mp); + #endif /* __XFS_TRANS_RESV_H__ */ |