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Date: Tue, 26 Apr 2022 11:15:59 +0530
From: Kanchan Joshi <joshi.k@samsung.com>
To: Stefan Roesch <shr@fb.com>
Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org,
kernel-team@fb.com, Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH v3 02/12] io_uring: wire up inline completion path for
CQE32
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On Mon, Apr 25, 2022 at 11:25:20AM -0700, Stefan Roesch wrote:
>Rather than always use the slower locked path, wire up use of the
>deferred completion path that normal CQEs can take.
That patch does not do that; patch 5 has what is said here. So bit of
rewording here may clear up the commit message.
>This reuses the
>hash list node for the storage we need to hold the two 64-bit values
>that must be passed back.
>
>Co-developed-by: Jens Axboe <axboe@kernel.dk>
>Signed-off-by: Stefan Roesch <shr@fb.com>
>Signed-off-by: Jens Axboe <axboe@kernel.dk>
>---
> fs/io_uring.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
>diff --git a/fs/io_uring.c b/fs/io_uring.c
>index 4c32cf987ef3..bf2b02518332 100644
>--- a/fs/io_uring.c
>+++ b/fs/io_uring.c
>@@ -964,7 +964,13 @@ struct io_kiocb {
> atomic_t poll_refs;
> struct io_task_work io_task_work;
> /* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */
>- struct hlist_node hash_node;
>+ union {
>+ struct hlist_node hash_node;
>+ struct {
>+ u64 extra1;
>+ u64 extra2;
>+ };
>+ };
> /* internal polling, see IORING_FEAT_FAST_POLL */
> struct async_poll *apoll;
> /* opcode allocated if it needs to store data for async defer */
>--
>2.30.2
>
>
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