在 2021/8/20 下午5:21, Hao Xu 写道:
在 2021/8/18 下午7:42, Pavel Begunkov 写道:
io_fallback_req_func() doesn't expect anyone creating inline
completions, and no one currently does that. Teach the function to flush
completions preparing for further changes.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
fs/io_uring.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3da9f1374612..ba087f395507 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1197,6 +1197,11 @@ static void io_fallback_req_func(struct
work_struct *work)
percpu_ref_get(&ctx->refs);
llist_for_each_entry_safe(req, tmp, node,
io_task_work.fallback_node)
req->io_task_work.func(req);
+
+ mutex_lock(&ctx->uring_lock);
+ if (ctx->submit_state.compl_nr)
+ io_submit_flush_completions(ctx);
+ mutex_unlock(&ctx->uring_lock);
why do we protect io_submit_flush_completions() with uring_lock,
regarding that it is called in original context. Btw, why not
I mean it is in original context before this patch..
use ctx_flush_and_put()
percpu_ref_put(&ctx->refs);
}
