From: Jens Axboe <[email protected]>
To: John David Anglin <[email protected]>,
Helge Deller <[email protected]>,
[email protected],
linux-parisc <[email protected]>
Subject: Re: [PATCHSET 0/5] User mapped provided buffer rings
Date: Wed, 15 Mar 2023 15:08:47 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 3/15/23 3:04?PM, John David Anglin wrote:
> On 2023-03-15 4:38 p.m., Jens Axboe wrote:
>> For file-verify.t, that one should work with the current tree. The issue
>> there is the use of registered buffers, and I added a parisc hack for
>> that. Maybe it's too specific to the PA8900 (the 128 byte stride). If
>> your tree does have:
> The 128 byte stride is only used on PA8800 and PA8900 processors. Other PA 2.0 processors
> use a 64 byte stride. PA 1.1 processors need a 32 byte stride.
>
> The following gcc defines are available: _PA_RISC2_0, _PA_RISC1_1 and _PA_RISC1_0.
Ah perfect!
> /proc/cpuinfo provides the CPU type but I'm not aware of any easy way to access the stride value
> from userspace. It's available from the PDC_CACHE call and it's used in the kernel.
model : 9000/785/C8000 - Crestone Peak Mako+ Slow [128]
I guess that's why it worked for me. OK, will ponder how to define that,
I think just going lowest common denominator is enough for now.
--
Jens Axboe
next prev parent reply other threads:[~2023-03-15 21:09 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-14 17:16 [PATCHSET 0/5] User mapped provided buffer rings Jens Axboe
2023-03-14 17:16 ` [PATCH 1/5] io_uring: Adjust mapping wrt architecture aliasing requirements Jens Axboe
2023-07-12 4:43 ` matoro
2023-07-12 16:24 ` Helge Deller
2023-07-12 17:28 ` matoro
2023-07-12 19:05 ` Helge Deller
2023-07-12 20:30 ` Helge Deller
2023-07-13 0:35 ` matoro
2023-07-13 7:27 ` Helge Deller
2023-07-13 23:57 ` matoro
2023-07-16 6:54 ` Helge Deller
2023-07-16 18:03 ` matoro
2023-07-16 20:54 ` Helge Deller
2023-03-14 17:16 ` [PATCH 2/5] io_uring/kbuf: move pinning of provided buffer ring into helper Jens Axboe
2023-03-14 17:16 ` [PATCH 3/5] io_uring/kbuf: add buffer_list->is_mapped member Jens Axboe
2023-03-14 17:16 ` [PATCH 4/5] io_uring/kbuf: rename struct io_uring_buf_reg 'pad' to'flags' Jens Axboe
2023-03-14 17:16 ` [PATCH 5/5] io_uring: add support for user mapped provided buffer ring Jens Axboe
2023-03-16 18:07 ` Ammar Faizi
2023-03-16 18:42 ` Jens Axboe
2023-03-15 20:03 ` [PATCHSET 0/5] User mapped provided buffer rings Helge Deller
2023-03-15 20:07 ` Helge Deller
2023-03-15 20:38 ` Jens Axboe
2023-03-15 21:04 ` John David Anglin
2023-03-15 21:08 ` Jens Axboe [this message]
2023-03-15 21:18 ` Jens Axboe
2023-03-16 10:18 ` Helge Deller
2023-03-16 17:00 ` Jens Axboe
2023-03-16 19:08 ` John David Anglin
2023-03-16 19:46 ` Jens Axboe
2023-03-17 2:09 ` Jens Axboe
2023-03-17 2:17 ` Jens Axboe
2023-03-17 15:36 ` John David Anglin
2023-03-17 15:57 ` Jens Axboe
2023-03-17 16:15 ` John David Anglin
2023-03-17 16:37 ` Jens Axboe
2023-03-15 20:11 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox