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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/06/2020 20:06, Jens Axboe wrote: > On 6/3/20 12:51 PM, Jens Axboe wrote: >> On 6/3/20 9:03 AM, Pavel Begunkov wrote: >>> The first one adds checks {SQPOLL,IOPOLL}. IOPOLL check can be >>> moved in the common path later, or rethinked entirely, e.g. >>> not io_iopoll_req_issued()'ed for unsupported opcodes. >>> >>> 3 others are just cleanups on top. >>> >>> >>> v2: add IOPOLL to the whole bunch of opcodes in [1/4]. >>> dirty and effective. >>> v3: sent wrong set in v2, re-sending right one >>> >>> Pavel Begunkov (4): >>> io_uring: fix {SQ,IO}POLL with unsupported opcodes >>> io_uring: do build_open_how() only once >>> io_uring: deduplicate io_openat{,2}_prep() >>> io_uring: move send/recv IOPOLL check into prep >>> >>> fs/io_uring.c | 94 ++++++++++++++++++++++++++------------------------- >>> 1 file changed, 48 insertions(+), 46 deletions(-) >> >> Thanks, applied. > > #1 goes too far, provide/remove buffers is fine with iopoll. I'll > going to edit the patch. Conceptually it should work, but from a quick look: - io_provide_buffers() drops a ref from req->refs, which should've been used by iopoll*. E.g. io_complete_rw_iopoll() doesn't do that. - it doesn't set REQ_F_IOPOLL_COMPLETED, thus iopoll* side will call req->file->iopoll(). -- Pavel Begunkov