On 4/21/22 19:49, Stefan Roesch wrote:
On 4/21/22 11:42 AM, Pavel Begunkov wrote:
On 4/20/22 23:51, Jens Axboe wrote:
On Wed, 20 Apr 2022 12:14:39 -0700, Stefan Roesch wrote:
This adds the large CQE support for io-uring. Large CQE's are 16 bytes longer.
To support the longer CQE's the allocation part is changed and when the CQE is
accessed.
The allocation of the large CQE's is twice as big, so the allocation size is
doubled. The ring size calculation needs to take this into account.
I'm missing something here, do we have a user for it apart
from no-op requests?
Pavel, what started this work is the patch series "io_uring passthru over nvme" from samsung.
(https://lore.kernel.org/io-uring/20220308152105.309618-1-joshi.k@xxxxxxxxxxx/)
They will use the large SQE and CQE support.
I see, thanks for clarifying. I saw it used in passthrough
patches, but it only got me more confused why it's applied
aforehand separately from the io_uring-cmd and passthrough
Applied, thanks!
[01/12] io_uring: support CQE32 in io_uring_cqe
commit: be428af6b204c2b366dd8b838bea87d1d4d9f2bd
[02/12] io_uring: wire up inline completion path for CQE32
commit: 8fc4fbc38db6538056498c88f606f958fbb24bfd
[03/12] io_uring: change ring size calculation for CQE32
commit: d09d3b8f2986899ff8f535c91d95c137b03595ec
[04/12] io_uring: add CQE32 setup processing
commit: a81124f0283879a7c5e77c0def9c725e84e79cb1
[05/12] io_uring: add CQE32 completion processing
commit: c7050dfe60c484f9084e57c2b1c88b8ab1f8a06d
[06/12] io_uring: modify io_get_cqe for CQE32
commit: f23855c3511dffa54069c9a0ed513b79bec39938
[07/12] io_uring: flush completions for CQE32
commit: 8a5be11b11449a412ef89c46a05e9bbeeab6652d
[08/12] io_uring: overflow processing for CQE32
commit: 2f1bbef557e9b174361ecd2f7c59b683bbca4464
[09/12] io_uring: add tracing for additional CQE32 fields
commit: b4df41b44f8f358f86533148aa0e56b27bca47d6
[10/12] io_uring: support CQE32 in /proc info
commit: 9d1b8d722dc06b9ab96db6e2bb967187c6185727
[11/12] io_uring: enable CQE32
commit: cae6c1bdf9704dee2d3c7803c36ef73ada19e238
[12/12] io_uring: support CQE32 for nop operation
commit: 460527265a0a6aa5107a7e4e4640f8d4b2088455
Best regards,
--
Pavel Begunkov
