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31151cc342
linux/fs/xfs
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Dave Chinner 31151cc342 xfs: rework per-iclog header CIL reservation 
For every iclog that a CIL push will use up, we need to ensure we
have space reserved for the iclog header in each iclog. It is
extremely difficult to do this accurately with a per-cpu counter
without expensive summing of the counter in every commit. However,
we know what the maximum CIL size is going to be because of the
hard space limit we have, and hence we know exactly how many iclogs
we are going to need to write out the CIL.

We are constrained by the requirement that small transactions only
have reservation space for a single iclog header built into them.
At commit time we don't know how much of the current transaction
reservation is made up of iclog header reservations as calculated by
xfs_log_calc_unit_res() when the ticket was reserved. As larger
reservations have multiple header spaces reserved, we can steal
more than one iclog header reservation at a time, but we only steal
the exact number needed for the given log vector size delta.

As a result, we don't know exactly when we are going to steal iclog
header reservations, nor do we know exactly how many we are going to
need for a given CIL.

To make things simple, start by calculating the worst case number of
iclog headers a full CIL push will require. Record this into an
atomic variable in the CIL. Then add a byte counter to the log
ticket that records exactly how much iclog header space has been
reserved in this ticket by xfs_log_calc_unit_res(). This tells us
exactly how much space we can steal from the ticket at transaction
commit time.

Now, at transaction commit time, we can check if the CIL has a full
iclog header reservation and, if not, steal the entire reservation
the current ticket holds for iclog headers. This minimises the
number of times we need to do atomic operations in the fast path,
but still guarantees we get all the reservations we need.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
2022-07-02 02:12:52 +10:00
..
libxfs xfs: don't hold xattr leaf buffers across transaction rolls 2022-06-29 08:47:56 -07:00
scrub xfs: implement per-mount warnings for scrub and shrink usage 2022-05-27 10:31:34 +10:00
Kconfig
kmem.c mm: introduce memalloc_retry_wait() 2022-01-15 16:30:29 +02:00
kmem.h xfs: remove kmem_zone typedef 2021-10-22 16:00:31 -07:00
Makefile xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
mrlock.h
xfs_acl.c xfs: move xfs_attr_use_log_assist usage out of libxfs 2022-05-27 10:34:04 +10:00
xfs_acl.h xfs: improve __xfs_set_acl 2022-04-26 13:34:42 +10:00
xfs_aops.c Page cache changes for 5.19 2022-05-24 19:55:07 -07:00
xfs_aops.h
xfs_attr_inactive.c xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_attr_item.c xfs: don't hold xattr leaf buffers across transaction rolls 2022-06-29 08:47:56 -07:00
xfs_attr_item.h xfs: share xattr name and value buffers when logging xattr updates 2022-05-23 08:43:46 +10:00
xfs_attr_list.c xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
xfs_bio_io.c Bug fixes for 5.18: 2022-04-01 19:30:44 -07:00
xfs_bmap_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_bmap_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_bmap_util.c xfs: dont treat rt extents beyond EOF as eofblocks to be cleared 2022-06-29 08:47:56 -07:00
xfs_bmap_util.h xfs: kill the XFS_IOC_{ALLOC,FREE}SP* ioctls 2022-01-17 09:16:41 -08:00
xfs_buf_item_recover.c xfs: convert buf_cancel_table allocation to kmalloc_array 2022-05-27 10:27:19 +10:00
xfs_buf_item.c xfs: log items should have a xlog pointer, not a mount 2022-03-20 08:59:49 -07:00
xfs_buf_item.h xfs: convert buffer log item flags to unsigned. 2022-04-21 10:46:40 +10:00
xfs_buf.c xfs: convert buffer flags to unsigned. 2022-04-21 08:44:59 +10:00
xfs_buf.h xfs: convert buffer flags to unsigned. 2022-04-21 08:44:59 +10:00
xfs_dir2_readdir.c xfs: take the ILOCK when readdir inspects directory mapping data 2022-01-11 15:11:04 -08:00
xfs_discard.c block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD 2022-04-17 19:49:59 -06:00
xfs_discard.h
xfs_dquot_item_recover.c
xfs_dquot_item.c
xfs_dquot_item.h
xfs_dquot.c xfs: remove warning counters from struct xfs_dquot_res 2022-05-11 17:12:09 +10:00
xfs_dquot.h xfs: remove warning counters from struct xfs_dquot_res 2022-05-11 17:12:09 +10:00
xfs_error.c xfs: add leaf to node error tag 2022-05-11 17:01:23 +10:00
xfs_error.h xfs: convert ptag flags to unsigned. 2022-04-21 10:47:25 +10:00
xfs_export.c
xfs_export.h
xfs_extent_busy.c
xfs_extent_busy.h
xfs_extfree_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_extfree_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_file.c xfs: Changes for 5.19-rc1 [2nd set] 2022-06-01 17:23:53 -07:00
xfs_filestream.c xfs: fix soft lockup via spinning in filestream ag selection loop 2022-04-26 13:34:54 +10:00
xfs_filestream.h
xfs_fsmap.c xfs: pass explicit mount pointer to rtalloc query functions 2022-04-12 06:49:41 +10:00
xfs_fsmap.h
xfs_fsops.c xfs: implement per-mount warnings for scrub and shrink usage 2022-05-27 10:31:34 +10:00
xfs_fsops.h
xfs_globals.c xfs: Add larp debug option 2022-05-11 17:01:22 +10:00
xfs_health.c
xfs_icache.c xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_icache.h xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_icreate_item.c xfs: fix potential log item leak 2022-05-04 11:45:11 +10:00
xfs_icreate_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_inode_item_recover.c xfs: hide log iovec alignment constraints 2022-05-04 11:45:50 +10:00
xfs_inode_item.c xfs: hide log iovec alignment constraints 2022-05-04 11:45:50 +10:00
xfs_inode_item.h xfs: aborting inodes on shutdown may need buffer lock 2022-03-29 18:21:59 -07:00
xfs_inode.c xfs: use invalidate_lock to check the state of mmap_lock 2022-06-26 14:43:28 -07:00
xfs_inode.h Merge tag 'large-extent-counters-v9' of https://github.com/chandanr/linux into xfs-5.19-for-next 2022-04-21 16:46:17 +10:00
xfs_ioctl32.c xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
xfs_ioctl32.h xfs: remove unused xfs_ioctl32.h declarations 2022-01-18 10:18:36 -08:00
xfs_ioctl.c xfs: preserve DIFLAG2_NREXT64 when setting other inode attributes 2022-06-15 23:13:33 -07:00
xfs_ioctl.h xfs: kill the XFS_IOC_{ALLOC,FREE}SP* ioctls 2022-01-17 09:16:41 -08:00
xfs_iomap.c xfs: Conditionally upgrade existing inodes to use large extent counters 2022-04-13 07:02:44 +00:00
xfs_iomap.h iomap: add a IOMAP_DAX flag 2021-12-04 08:58:53 -08:00
xfs_iops.c xfs: move xfs_attr_use_log_assist usage out of libxfs 2022-05-27 10:34:04 +10:00
xfs_iops.h
xfs_itable.c xfs: Enable bulkstat ioctl to support 64-bit per-inode extent counters 2022-04-13 07:02:45 +00:00
xfs_itable.h xfs: Enable bulkstat ioctl to support 64-bit per-inode extent counters 2022-04-13 07:02:45 +00:00
xfs_iwalk.c
xfs_iwalk.h xfs: Decouple XFS_IBULK flags from XFS_IWALK flags 2022-04-13 07:02:44 +00:00
xfs_linux.h xfs: drop async cache flushes from CIL commits. 2022-03-29 18:22:02 -07:00
xfs_log_cil.c xfs: rework per-iclog header CIL reservation 2022-07-02 02:12:52 +10:00
xfs_log_priv.h xfs: rework per-iclog header CIL reservation 2022-07-02 02:12:52 +10:00
xfs_log_recover.c xfs: convert buf_cancel_table allocation to kmalloc_array 2022-05-27 10:27:19 +10:00
xfs_log.c xfs: rework per-iclog header CIL reservation 2022-07-02 02:12:52 +10:00
xfs_log.h xfs: share xattr name and value buffers when logging xattr updates 2022-05-23 08:43:46 +10:00
xfs_message.c Merge branch 'guilt/xfs-unsigned-flags-5.18' into xfs-5.19-for-next 2022-04-21 16:45:03 +10:00
xfs_message.h xfs: implement per-mount warnings for scrub and shrink usage 2022-05-27 10:31:34 +10:00
xfs_mount.c xfs: don't log every time we clear the log incompat flags 2022-05-27 10:29:51 +10:00
xfs_mount.h xfs: bound maximum wait time for inodegc work 2022-06-23 13:34:38 -07:00
xfs_mru_cache.c xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_mru_cache.h
xfs_ondisk.h xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
xfs_pnfs.c xfs: use setattr_copy to set vfs inode attributes 2022-03-14 10:23:16 -07:00
xfs_pnfs.h
xfs_pwork.c
xfs_pwork.h
xfs_qm_bhv.c
xfs_qm_syscalls.c xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_qm.c xfs: purge dquots after inode walk fails during quotacheck 2022-05-27 10:21:43 +10:00
xfs_qm.h xfs: remove quota warning limit from struct xfs_quota_limits 2022-05-11 17:12:09 +10:00
xfs_quota.h
xfs_quotaops.c xfs: don't set quota warning values 2022-05-11 17:12:09 +10:00
xfs_refcount_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_refcount_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_reflink.c xfs: rewrite xfs_reflink_end_cow to use intents 2022-04-28 10:25:50 -07:00
xfs_reflink.h
xfs_rmap_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_rmap_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_rtalloc.c Merge tag 'large-extent-counters-v9' of https://github.com/chandanr/linux into xfs-5.19-for-next 2022-04-21 16:46:17 +10:00
xfs_rtalloc.h xfs: recalculate free rt extents after log recovery 2022-04-12 06:49:42 +10:00
xfs_stats.c
xfs_stats.h
xfs_super.c xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_super.h xfs: move xfs_attr_use_log_assist out of xfs_log.c 2022-05-27 10:33:29 +10:00
xfs_symlink.c xfs: Directory's data fork extent counter can never overflow 2022-04-13 07:02:07 +00:00
xfs_symlink.h
xfs_sysctl.c
xfs_sysctl.h xfs: Add larp debug option 2022-05-11 17:01:22 +10:00
xfs_sysfs.c xfs: Add larp debug option 2022-05-11 17:01:22 +10:00
xfs_sysfs.h
xfs_trace.c
xfs_trace.h xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_trans_ail.c xfs: log shutdown triggers should only shut down the log 2022-03-29 18:22:01 -07:00
xfs_trans_buf.c
xfs_trans_dquot.c xfs: remove quota warning limit from struct xfs_quota_limits 2022-05-11 17:12:09 +10:00
xfs_trans_priv.h xfs: AIL should be log centric 2022-03-20 08:59:49 -07:00
xfs_trans.c xfs: report "max_resp" used for min log size computation 2022-04-28 10:25:23 -07:00
xfs_trans.h xfs: intent item whiteouts 2022-05-04 11:50:29 +10:00
xfs_xattr.c xfs: fix TOCTOU race involving the new logged xattrs control knob 2022-06-15 23:13:32 -07:00
xfs_xattr.h xfs: move xfs_attr_use_log_assist usage out of libxfs 2022-05-27 10:34:04 +10:00
xfs.h