From: keith.busch@linux.intel.com (Keith Busch)
Subject: Can not set SMP affinity on kernels above 3.10.0-514
Date: Wed, 26 Sep 2018 11:30:19 -0600 [thread overview]
Message-ID: <20180926173019.GA17405@localhost.localdomain> (raw)
In-Reply-To: <CAHC07GSK=-_c-9pmRb60iyfvbzqD53NYai_muLUajJsj4O7wig@mail.gmail.com>
On Wed, Sep 26, 2018@10:38:12AM -0600, Brian Atkinson wrote:
> I am currently receiving the following error whenever I go to adjust
> the smp_affinity/smp_affinity_list files for IRQ's associated the
> Samsung NVMe SDD PM1725a installed in a Dell PowerEdge R7425 server:
>
> echo: write error: Input/output error
>
> I have stopped/disabled irqbalance using the following:
>
> systemctl stop irqbalance
> systemctl disable irqbalance
>
> However, I still get the Input/output error when I try and echo any
> values into either the smp_affinity or smp_affinity_list files. What
> is really peculiar about this, is I have no issues updating the values
> in these files as long as I am on the stock kernel 3.10.0-514 that
> came with CentOS 7.3; however, whenever I get this error on the
> following kernels 3.10.0-862.11.6, 4.4.153-1, and 4.18.5-1. Since I am
> only experiencing this issue in these newer kernels, I imagine there
> is some setting I do not have set that is preventing me from updating
> the SMP affinity values for the NVMe SDD's IRQ's. Has anyone else
> experienced this issue and possibly know how to correct it?
NVMe interrupts are kernel managed, which isn't changeable from
user space.
prev parent reply other threads:[~2018-09-26 17:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 16:38 Can not set SMP affinity on kernels above 3.10.0-514 Brian Atkinson
2018-09-26 17:30 ` Keith Busch [this message]
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 \
--in-reply-to=20180926173019.GA17405@localhost.localdomain \
--to=keith.busch@linux.intel.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.