From af1c2146a50b1ffe7e10cae1f7e64ab56b7f8c1f Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Sat, 2 Jul 2022 02:13:52 +1000 Subject: xfs: introduce per-cpu CIL tracking structure The CIL push lock is highly contended on larger machines, becoming a hard bottleneck that about 700,000 transaction commits/s on >16p machines. To address this, start moving the CIL tracking infrastructure to utilise per-CPU structures. We need to track the space used, the amount of log reservation space reserved to write the CIL, the log items in the CIL and the busy extents that need to be completed by the CIL commit. This requires a couple of per-cpu counters, an unordered per-cpu list and a globally ordered per-cpu list. Create a per-cpu structure to hold these and all the management interfaces needed, as well as the hooks to handle hotplug CPUs. Signed-off-by: Dave Chinner Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_log_priv.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'fs/xfs/xfs_log_priv.h') diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 74436482c28d..70483c78953e 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -231,6 +231,14 @@ struct xfs_cil_ctx { struct work_struct push_work; }; +/* + * Per-cpu CIL tracking items + */ +struct xlog_cil_pcp { + struct list_head busy_extents; + struct list_head log_items; +}; + /* * Committed Item List structure * @@ -266,6 +274,11 @@ struct xfs_cil { wait_queue_head_t xc_start_wait; xfs_csn_t xc_current_sequence; wait_queue_head_t xc_push_wait; /* background push throttle */ + + void __percpu *xc_pcp; /* percpu CIL structures */ +#ifdef CONFIG_HOTPLUG_CPU + struct list_head xc_pcp_list; +#endif } ____cacheline_aligned_in_smp; /* xc_flags bit values */ @@ -688,4 +701,9 @@ xlog_kvmalloc( return p; } +/* + * CIL CPU dead notifier + */ +void xlog_cil_pcp_dead(struct xlog *log, unsigned int cpu); + #endif /* __XFS_LOG_PRIV_H__ */ -- cgit