From: Michael Wang <[email protected]> This patch implements the new 'rcudata.csv' interface under each rsp directory, by using the 'CPU units sequence reading', thus avoiding loss of tracing data.
Signed-off-by: Michael Wang <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- kernel/rcutree_trace.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 42 insertions(+), 0 deletions(-) diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c index a11522f..e387a64 100644 --- a/kernel/rcutree_trace.c +++ b/kernel/rcutree_trace.c @@ -267,6 +267,43 @@ static const struct file_operations rcudata_csv_fops = { .release = single_release, }; +static int new_show_rcudata_csv(struct seq_file *m, void *v) +{ + struct rcu_data *rdp = (struct rcu_data *)v; + if (cpumask_first(cpu_possible_mask) == rdp->cpu) { + seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pq\","); + seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); + seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\""); +#ifdef CONFIG_RCU_BOOST + seq_puts(m, "\"kt\",\"ktl\""); +#endif /* #ifdef CONFIG_RCU_BOOST */ + seq_puts(m, ",\"b\",\"ci\",\"co\",\"ca\"\n"); + } + + print_one_rcu_data_csv(m, rdp); + return 0; +} + +static const struct seq_operations new_rcudate_csv_op = { + .start = r_start, + .next = r_next, + .stop = r_stop, + .show = new_show_rcudata_csv, +}; + +static int new_rcudata_csv_open(struct inode *inode, struct file *file) +{ + return r_open(inode, file, &new_rcudate_csv_op); +} + +static const struct file_operations new_rcudata_csv_fops = { + .owner = THIS_MODULE, + .open = new_rcudata_csv_open, + .read = seq_read, + .llseek = no_llseek, + .release = seq_release, +}; + #ifdef CONFIG_RCU_BOOST static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) @@ -519,6 +556,11 @@ static int __init rcutree_trace_init(void) rspdir, rsp, &new_rcudata_fops); if (!retval) goto free_out; + + retval = debugfs_create_file("rcudata.csv", 0444, + rspdir, rsp, &new_rcudata_csv_fops); + if (!retval) + goto free_out; } retval = debugfs_create_file("rcubarrier", 0444, rcudir, -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
