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xfs: expose the blockgc workqueue knobs publicly

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Expose the workqueue sysfs knobs for the speculative preallocation gc
workers on all kernels, and update the sysadmin information.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2021-01-25 16:39:01 -08:00
parent 894ecacf0f
commit 47bd6d3457
2 changed files with 4 additions and 1 deletions
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3
Documentation/admin-guide/xfs.rst
View File

@ -518,6 +518,9 @@ and the short name of the data device. They all can be found in:
================ ===========
xfs_iwalk-$pid Inode scans of the entire filesystem. Currently limited to
mount time quotacheck.
xfs-blockgc Background garbage collection of disk space that have been
speculatively allocated beyond EOF or for staging copy on
write operations.
================ ===========
For example, the knobs for the quotacheck workqueue for /dev/nvme0n1 would be

2
fs/xfs/xfs_super.c
View File

@ -520,7 +520,7 @@ xfs_init_mount_workqueues(
goto out_destroy_cil;
mp->m_blockgc_workqueue = alloc_workqueue("xfs-blockgc/%s",
XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM),
WQ_SYSFS | WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM,
0, mp->m_super->s_id);
if (!mp->m_blockgc_workqueue)
goto out_destroy_reclaim;