xfs: introduce all-mounts list for cpu hotplug notifications

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The inode inactivation and CIL tracking percpu structures are
per-xfs_mount structures. That means when we get a CPU dead
notification, we need to then iterate all the per-cpu structure
instances to process them. Rather than keeping linked lists of
per-cpu structures in each subsystem, add a list of all xfs_mounts
that the generic xfs_cpu_dead() function will iterate and call into
each subsystem appropriately.

This allows us to handle both per-mount and global XFS percpu state
from xfs_cpu_dead(), and avoids the need to link subsystem
structures that can be easily found from the xfs_mount into their
own global lists.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
[djwong: expand some comments about mount list setup ordering rules]
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

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Dave Chinner 2021-08-06 11:05:38 -07:00 • committed by Darrick J. Wong

parent f1653c2e28

commit 0ed17f01c8

2 changed files with 41 additions and 0 deletions

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1

fs/xfs/xfs_mount.h

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40

fs/xfs/xfs_super.c

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