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xfs: use xas_for_each_marked in xfs_reclaim_inodes_count

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xfs_reclaim_inodes_count iterates over all AGs to sum up the reclaimable
inodes counts.  There is no point in grabbing a reference to the them or
unlock the RCU critical section for each iteration, so switch to the
more efficient xas_for_each_marked iterator.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-08-29 07:08:41 +03:00 committed by Chandan Babu R
parent 32fa4059fe
commit 866cf1dd3d
2 changed files with 9 additions and 29 deletions
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36
fs/xfs/xfs_icache.c
View File

@ -300,32 +300,6 @@ xfs_perag_clear_inode_tag(
trace_xfs_perag_clear_inode_tag(pag, _RET_IP_);
}
/*
* Find the next AG after @pag, or the first AG if @pag is NULL.
*/
static struct xfs_perag *
xfs_perag_get_next_tag(
struct xfs_mount *mp,
struct xfs_perag *pag,
unsigned int tag)
{
unsigned long index = 0;
if (pag) {
index = pag->pag_agno + 1;
xfs_perag_rele(pag);
}
rcu_read_lock();
pag = xa_find(&mp->m_perags, &index, ULONG_MAX, ici_tag_to_mark(tag));
if (pag) {
trace_xfs_perag_get_next_tag(pag, _RET_IP_);
atomic_inc(&pag->pag_ref);
}
rcu_read_unlock();
return pag;
}
/*
* Find the next AG after @pag, or the first AG if @pag is NULL.
*/
@ -1080,11 +1054,17 @@ long
xfs_reclaim_inodes_count(
struct xfs_mount *mp)
{
struct xfs_perag *pag = NULL;
XA_STATE (xas, &mp->m_perags, 0);
long reclaimable = 0;
struct xfs_perag *pag;
while ((pag = xfs_perag_get_next_tag(mp, pag, XFS_ICI_RECLAIM_TAG)))
rcu_read_lock();
xas_for_each_marked(&xas, pag, ULONG_MAX, XFS_PERAG_RECLAIM_MARK) {
trace_xfs_reclaim_inodes_count(pag, _THIS_IP_);
reclaimable += pag->pag_ici_reclaimable;
}
rcu_read_unlock();
return reclaimable;
}

2
fs/xfs/xfs_trace.h
View File

@ -210,7 +210,6 @@ DEFINE_EVENT(xfs_perag_class, name, \
TP_PROTO(struct xfs_perag *pag, unsigned long caller_ip), \
TP_ARGS(pag, caller_ip))
DEFINE_PERAG_REF_EVENT(xfs_perag_get);
DEFINE_PERAG_REF_EVENT(xfs_perag_get_next_tag);
DEFINE_PERAG_REF_EVENT(xfs_perag_hold);
DEFINE_PERAG_REF_EVENT(xfs_perag_put);
DEFINE_PERAG_REF_EVENT(xfs_perag_grab);
@ -218,6 +217,7 @@ DEFINE_PERAG_REF_EVENT(xfs_perag_grab_next_tag);
DEFINE_PERAG_REF_EVENT(xfs_perag_rele);
DEFINE_PERAG_REF_EVENT(xfs_perag_set_inode_tag);
DEFINE_PERAG_REF_EVENT(xfs_perag_clear_inode_tag);
DEFINE_PERAG_REF_EVENT(xfs_reclaim_inodes_count);
TRACE_EVENT(xfs_inodegc_worker,
TP_PROTO(struct xfs_mount *mp, unsigned int shrinker_hits),