Searched hist:f5fbe6b7 (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/include/linux/ |
| H A D | backing-dev-defs.h | f5fbe6b7 Mon Jun 28 21:35:59 CDT 2021 Roman Gushchin <guro@fb.com> writeback, cgroup: support switching multiple inodes at once
Currently only a single inode can be switched to another writeback
structure at once. That means to switch an inode a separate
inode_switch_wbs_context structure must be allocated, and a separate rcu
callback and work must be scheduled.
It's fine for the existing ad-hoc switching, which is not happening that
often, but sub-optimal for massive switching required in order to release
a writeback structure. To prepare for it, let's add a support for
switching multiple inodes at once.
Instead of containing a single inode pointer, inode_switch_wbs_context
will contain a NULL-terminated array of inode pointers.
inode_do_switch_wbs() will be called for each inode.
To optimize the locking bdi->wb_switch_rwsem, old_wb's and new_wb's
list_locks will be acquired and released only once altogether for all
inodes. wb_wakeup() will be also be called only once. Instead of calling
wb_put(old_wb) after each successful switch, wb_put_many() is introduced
and used.
Link: https://lkml.kernel.org/r/20210608230225.2078447-8-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dennis Zhou <dennis@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Jan Kara <jack@suse.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| /openbmc/linux/fs/ |
| H A D | fs-writeback.c | f5fbe6b7 Mon Jun 28 21:35:59 CDT 2021 Roman Gushchin <guro@fb.com> writeback, cgroup: support switching multiple inodes at once
Currently only a single inode can be switched to another writeback
structure at once. That means to switch an inode a separate
inode_switch_wbs_context structure must be allocated, and a separate rcu
callback and work must be scheduled.
It's fine for the existing ad-hoc switching, which is not happening that
often, but sub-optimal for massive switching required in order to release
a writeback structure. To prepare for it, let's add a support for
switching multiple inodes at once.
Instead of containing a single inode pointer, inode_switch_wbs_context
will contain a NULL-terminated array of inode pointers.
inode_do_switch_wbs() will be called for each inode.
To optimize the locking bdi->wb_switch_rwsem, old_wb's and new_wb's
list_locks will be acquired and released only once altogether for all
inodes. wb_wakeup() will be also be called only once. Instead of calling
wb_put(old_wb) after each successful switch, wb_put_many() is introduced
and used.
Link: https://lkml.kernel.org/r/20210608230225.2078447-8-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dennis Zhou <dennis@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Jan Kara <jack@suse.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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