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Subject[PATCH] workqueue: show the pool ID of the default pwq's pool in the pool_ids file
Date
It seems incomplete if the pool_ids file doesn't include the default
pwq's pool. Add it and the result:

# cat pool_ids
0:9 1:10
default:8

rcu_read_lock_sched() is also changed to mutex_lock(&wq->mutex)
for accessing the default pwq.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
kernel/workqueue.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 5dbe22a..6af95210 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3004,7 +3004,7 @@ static ssize_t wq_pool_ids_show(struct device *dev,
const char *delim = "";
int node, written = 0;

- rcu_read_lock_sched();
+ mutex_lock(&wq->mutex);
for_each_node(node) {
written += scnprintf(buf + written, PAGE_SIZE - written,
"%s%d:%d", delim, node,
@@ -3012,7 +3012,9 @@ static ssize_t wq_pool_ids_show(struct device *dev,
delim = " ";
}
written += scnprintf(buf + written, PAGE_SIZE - written, "\n");
- rcu_read_unlock_sched();
+ written += scnprintf(buf + written, PAGE_SIZE - written,
+ "default:%d\n", wq->dfl_pwq->pool->id);
+ mutex_unlock(&wq->mutex);

return written;
}
--
1.7.4.4


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