lkml.org 
[lkml]   [2021]   [Oct]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v4 1/8] PCI/AER: Remove ID from aer_agent_string[]
On Thu, Oct 21, 2021 at 10:00:21PM +0530, Naveen Naidu wrote:
> On 20/10, Bjorn Helgaas wrote:
> > On Tue, Oct 05, 2021 at 10:48:08PM +0530, Naveen Naidu wrote:
> > > Currently, we do not print the "id" field in the AER error logs. Yet the
> > > aer_agent_string[] has the word "id" in it. The AER error log looks
> > > like:
> > >
> > > pcieport 0000:00:03.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Receiver ID)
> > >
> > > Without the "id" field in the error log, The aer_agent_string[]
> > > (eg: "Receiver ID") does not make sense. A user reading the
> > > aer_agent_string[] in the log, might inadvertently look for an "id"
> > > field and not finding it might lead to confusion.
> > >
> > > Remove the "ID" from the aer_agent_string[].
> > >
> > > The following are sample dummy errors inject via aer-inject.
> >
> > I like this, and the problem it fixes was my fault because
> > these "ID" strings should have been removed by 010caed4ccb6.
> >
> > If it's straightforward enough, it would be nice to have the
> > aer-inject command line here in the commit log to make it easier
> > for people to play with this.
> >
>
> Thank you for the review. Do you mean something like:
>
> The following sample dummy errors are injected via aer-inject via the
> following steps:
>
> 1. The steps to compile the aer-inject tool is mentioned in (Section
> 4. Software error inject) of the document [1]
>
> [1]: https://www.kernel.org/doc/Documentation/PCI/pcieaer-howto.txt
>
> Make sure to place the aer-inject executable at the home directory
> of the qemu system or at any other place.
>
> 2. Emulate a PCIE architecture using qemu, A sample looks like
> following:
>
> qemu-system-x86_64 -kernel ../linux/arch/x86_64/boot/bzImage \
> -initrd buildroot-build/images/rootfs.cpio.gz \
> -append "console=ttyS0" \
> -enable-kvm -nographic \
> -M q35 \
> -device pcie-root-port,bus=pcie.0,id=rp1,slot=1 \
> -device pcie-pci-bridge,id=br1,bus=rp1 \
> -device e1000,bus=br1,addr=8
>
> Note that the PCIe features are available only when using the
> 'q35' Machine [2]
> [2]: https://github.com/qemu/qemu/blob/master/docs/pcie.txt
>
> 3. Once the qemu system starts up, create a sample aer-file or use any
> example aer file from [3]
>
> [3]:
> https://git.kernel.org/pub/scm/linux/kernel/git/gong.chen/aer-inject.git/tree/examples
>
> 4. Inject any aer-error using
>
> ./aer-inject aer-file
>
> This does look a tad bit longer for a commit log so I am unsure if you
> would like to have it there. If you are okay with it, I would be happy
> to add it to that :)

Yes, that's kind of long. Something like this
https://git.kernel.org/linus/d95f20c4f070 would be enough for the
commit log, especially since you've now provided all the details in
the email thread, where we can find them via the Link: tag.

Bjorn

\
 
 \ /
  Last update: 2021-10-21 19:04    [W:0.052 / U:1.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site