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linux-stable/fs/xfs
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Dave Chinner 2def2845cc xfs: don't allow log IO to be throttled 
Running metadata intensive workloads, I've been seeing the AIL
pushing getting stuck on pinned buffers and triggering log forces.
The log force is taking a long time to run because the log IO is
getting throttled by wbt_wait() - the block layer writeback
throttle. It's being throttled because there is a huge amount of
metadata writeback going on which is filling the request queue.

IOWs, we have a priority inversion problem here.

Mark the log IO bios with REQ_IDLE so they don't get throttled
by the block layer writeback throttle. When we are forcing the CIL,
we are likely to need to to tens of log IOs, and they are issued as
fast as they can be build and IO completed. Hence REQ_IDLE is
appropriate - it's an indication that more IO will follow shortly.

And because we also set REQ_SYNC, the writeback throttle will now
treat log IO the same way it treats direct IO writes - it will not
throttle them at all. Hence we solve the priority inversion problem
caused by the writeback throttle being unable to distinguish between
high priority log IO and background metadata writeback.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-03-27 08:32:54 -07:00
..
libxfs xfs: validate the realtime geometry in xfs_validate_sb_common 2020-03-27 08:32:53 -07:00
scrub xfs: prohibit fs freezing when using empty transactions 2020-03-26 08:19:24 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
kmem.c xfs: Correct comment tyops -> typos 2019-11-10 10:21:57 -08:00
kmem.h xfs: Remove kmem_zone_free() wrapper 2019-11-18 08:40:44 -08:00
Makefile xfs: introduce fake roots for ag-rooted btrees 2020-03-18 08:12:23 -07:00
mrlock.h
xfs.h
xfs_acl.c xfs: only allocate the buffer size actually needed in __xfs_set_acl 2020-03-02 20:55:55 -08:00
xfs_acl.h xfs: improve xfs_forget_acl 2020-03-02 20:55:55 -08:00
xfs_aops.c xfs: ratelimit xfs_discard_page messages 2020-03-02 20:55:51 -08:00
xfs_aops.h xfs: add a xfs_inode_buftarg helper 2019-10-28 08:37:54 -07:00
xfs_attr_inactive.c xfs: add a function to deal with corrupt buffers post-verifiers 2020-03-12 07:58:12 -07:00
xfs_attr_list.c xfs: add a function to deal with corrupt buffers post-verifiers 2020-03-12 07:58:12 -07:00
xfs_bio_io.c xfs: chain bios the right way around in xfs_rw_bdev 2019-07-10 10:04:16 -07:00
xfs_bmap_item.c xfs: Remove kmem_zone_free() wrapper 2019-11-18 08:40:44 -08:00
xfs_bmap_item.h xfs: merge xfs_bud_init into xfs_trans_get_bud 2019-06-28 19:27:36 -07:00
xfs_bmap_util.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_bmap_util.h xfs: simplify xfs_iomap_eof_align_last_fsb 2019-11-03 10:22:30 -08:00
xfs_buf.c xfs: xfs_buf_corruption_error should take __this_address 2020-03-12 07:58:12 -07:00
xfs_buf.h xfs: add a function to deal with corrupt buffers post-verifiers 2020-03-12 07:58:12 -07:00
xfs_buf_item.c xfs: add a new xfs_sb_version_has_v3inode helper 2020-03-19 08:47:34 -07:00
xfs_buf_item.h xfs: check log iovec size to make sure it's plausibly a buffer log format 2020-01-16 08:07:24 -08:00
xfs_dir2_readdir.c xfs: fix regression in "cleanup xfs_dir2_block_getdents" 2020-03-13 10:37:13 -07:00
xfs_discard.c xfs: remove XFS_BUF_TO_AGF 2020-03-11 09:11:39 -07:00
xfs_discard.h
xfs_dquot.c xfs: remove the kuid/kgid conversion wrappers 2020-03-02 20:55:50 -08:00
xfs_dquot.h xfs: remove the xfs_dq_logitem_t typedef 2019-11-13 18:22:26 -08:00
xfs_dquot_item.c xfs: fix unmount hang and memory leak on shutdown during quotaoff 2020-03-18 08:12:23 -07:00
xfs_dquot_item.h xfs: factor out quotaoff intent AIL removal and memory free 2020-03-18 08:12:23 -07:00
xfs_error.c xfs: xfs_buf_corruption_error should take __this_address 2020-03-12 07:58:12 -07:00
xfs_error.h xfs: xfs_buf_corruption_error should take __this_address 2020-03-12 07:58:12 -07:00
xfs_export.c xfs: remove unused header files 2019-06-28 19:30:43 -07:00
xfs_export.h
xfs_extent_busy.c xfs: cleanup use of the XFS_ALLOC_ flags 2019-11-03 10:22:31 -08:00
xfs_extent_busy.h
xfs_extfree_item.c xfs: Remove kmem_zone_free() wrapper 2019-11-18 08:40:44 -08:00
xfs_extfree_item.h xfs: merge xfs_efd_init into xfs_trans_get_efd 2019-06-28 19:27:35 -07:00
xfs_file.c xfs: fix IOCB_NOWAIT handling in xfs_file_dio_aio_read 2020-01-15 22:13:11 -08:00
xfs_filestream.c xfs: make xfs_*read_agf return EAGAIN to ALLOC_FLAG_TRYLOCK callers 2020-01-26 14:32:26 -08:00
xfs_filestream.h
xfs_fsmap.c xfs: prohibit fs freezing when using empty transactions 2020-03-26 08:19:24 -07:00
xfs_fsmap.h
xfs_fsops.c xfs: remove unused header files 2019-06-28 19:30:43 -07:00
xfs_fsops.h
xfs_globals.c xfs: multithreaded iwalk implementation 2019-07-03 07:33:26 -07:00
xfs_health.c xfs: introduce new v5 bulkstat structure 2019-07-03 20:36:26 -07:00
xfs_icache.c xfs: ensure that the inode uid/gid match values match the icdinode ones 2020-03-02 20:55:50 -08:00
xfs_icache.h
xfs_icreate_item.c xfs: Remove kmem_zone_free() wrapper 2019-11-18 08:40:44 -08:00
xfs_icreate_item.h
xfs_inode.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_inode.h xfs: merge the projid fields in struct xfs_icdinode 2019-11-13 11:13:45 -08:00
xfs_inode_item.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_inode_item.h xfs: remove the xfs_log_item_t typedef 2019-06-28 19:27:33 -07:00
xfs_ioctl.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_ioctl.h xfs: embedded the attrlist cursor into struct xfs_attr_list_context 2020-03-02 20:55:55 -08:00
xfs_ioctl32.c xfs: lift cursor copy in/out into xfs_ioc_attr_list 2020-03-02 20:55:54 -08:00
xfs_ioctl32.h xfs: rename compat_time_t to old_time32_t 2020-01-06 08:57:36 -08:00
xfs_iomap.c xfs: change return value of xfs_inode_need_cow to int 2020-01-20 14:34:47 -08:00
xfs_iomap.h xfs: simplify the xfs_iomap_write_direct calling 2019-11-03 10:22:30 -08:00
xfs_iops.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_iops.h
xfs_itable.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_itable.h xfs: remove all *_ITER_ABORT values 2019-08-29 21:22:41 -07:00
xfs_iwalk.c xfs: kill the XFS_WANT_CORRUPT_* macros 2019-11-12 17:19:02 -08:00
xfs_iwalk.h xfs: remove all *_ITER_CONTINUE values 2019-08-30 22:43:56 -07:00
xfs_linux.h xfs: clean up the attr flag confusion 2020-03-02 20:55:55 -08:00
xfs_log.c xfs: don't allow log IO to be throttled 2020-03-27 08:32:54 -07:00
xfs_log.h xfs: refactor and split xfs_log_done() 2020-03-27 08:32:53 -07:00
xfs_log_cil.c xfs: Throttle commits on delayed background CIL push 2020-03-27 08:32:54 -07:00
xfs_log_priv.h xfs: Throttle commits on delayed background CIL push 2020-03-27 08:32:54 -07:00
xfs_log_recover.c xfs: remove the di_version field from struct icdinode 2020-03-19 08:48:47 -07:00
xfs_message.c xfs: make the assertion message functions take a mount parameter 2019-11-05 08:28:27 -08:00
xfs_message.h xfs: make the assertion message functions take a mount parameter 2019-11-05 08:28:27 -08:00
xfs_mount.c xfs: remove XFS_BUF_TO_SBP 2020-03-11 09:11:39 -07:00
xfs_mount.h xfs: remove unused structure members & simple typedefs 2019-11-13 18:22:41 -08:00
xfs_mru_cache.c fs: xfs: Remove KM_NOSLEEP and KM_SLEEP. 2019-08-26 12:06:22 -07:00
xfs_mru_cache.h
xfs_ondisk.h xfs: make struct xfs_buf_log_format have a consistent size 2020-01-16 08:07:23 -08:00
xfs_pnfs.c xfs: use super s_id instead of struct xfs_mount m_fsname 2019-11-05 08:28:25 -08:00
xfs_pnfs.h
xfs_pwork.c xfs: poll waiting for quotacheck 2019-07-03 08:21:58 -07:00
xfs_pwork.h xfs: poll waiting for quotacheck 2019-07-03 08:21:58 -07:00
xfs_qm.c xfs: preserve default grace interval during quotacheck 2020-03-26 08:19:24 -07:00
xfs_qm.h xfs: quota: move to time64_t interfaces 2020-01-06 08:57:37 -08:00
xfs_qm_bhv.c xfs: remove the xfs_disk_dquot_t and xfs_dquot_t 2019-11-13 11:13:45 -08:00
xfs_qm_syscalls.c xfs: fix unmount hang and memory leak on shutdown during quotaoff 2020-03-18 08:12:23 -07:00
xfs_quota.h xfs: remove the icdinode di_uid/di_gid members 2020-03-02 20:55:50 -08:00
xfs_quotaops.c xfs: quota: move to time64_t interfaces 2020-01-06 08:57:37 -08:00
xfs_refcount_item.c xfs: Remove kmem_zone_free() wrapper 2019-11-18 08:40:44 -08:00
xfs_refcount_item.h xfs: merge xfs_cud_init into xfs_trans_get_cud 2019-06-28 19:27:35 -07:00
xfs_reflink.c xfs: remove unnecessary null pointer checks from _read_agf callers 2020-01-26 14:32:27 -08:00
xfs_reflink.h xfs: change return value of xfs_inode_need_cow to int 2020-01-20 14:34:47 -08:00
xfs_rmap_item.c xfs: Remove kmem_zone_free() wrapper 2019-11-18 08:40:44 -08:00
xfs_rmap_item.h xfs: merge xfs_rud_init into xfs_trans_get_rud 2019-06-28 19:27:36 -07:00
xfs_rtalloc.c xfs: make xfs_trans_get_buf return an error code 2020-01-26 14:32:26 -08:00
xfs_rtalloc.h
xfs_stats.c xfs: Use scnprintf() for avoiding potential buffer overflow 2020-03-12 07:58:13 -07:00
xfs_stats.h
xfs_super.c Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-02-08 13:26:41 -08:00
xfs_super.h xfs: include QUOTA, FATAL ASSERT build options in XFS_BUILD_OPTIONS 2019-10-21 09:04:57 -07:00
xfs_symlink.c xfs: only check the superblock version for dinode size calculation 2020-03-19 08:48:47 -07:00
xfs_symlink.h xfs: Correct comment tyops -> typos 2019-11-10 10:21:57 -08:00
xfs_sysctl.c xfs: remove unused header files 2019-06-28 19:30:43 -07:00
xfs_sysctl.h xfs: multithreaded iwalk implementation 2019-07-03 07:33:26 -07:00
xfs_sysfs.c xfs: avoid unused to_mp() function warning 2019-09-24 09:40:19 -07:00
xfs_sysfs.h
xfs_trace.c xfs: support bulk loading of staged btrees 2020-03-18 08:12:23 -07:00
xfs_trace.h xfs: Throttle commits on delayed background CIL push 2020-03-27 08:32:54 -07:00
xfs_trans.c xfs: split xlog_ticket_done 2020-03-27 08:32:53 -07:00
xfs_trans.h xfs: make xfs_trans_get_buf return an error code 2020-01-26 14:32:26 -08:00
xfs_trans_ail.c xfs: clear PF_MEMALLOC before exiting xfsaild thread 2020-03-11 09:11:38 -07:00
xfs_trans_buf.c xfs: fix xfs_buf_ioerror_alert location reporting 2020-01-26 14:32:27 -08:00
xfs_trans_dquot.c xfs: quota: move to time64_t interfaces 2020-01-06 08:57:37 -08:00
xfs_trans_priv.h xfs: don't use xfs_trans_free_items in the commit path 2019-06-28 19:27:31 -07:00
xfs_xattr.c xfs: embedded the attrlist cursor into struct xfs_attr_list_context 2020-03-02 20:55:55 -08:00