BPF Archive on lore.kernel.org
 help / color / Atom feed
From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Eelco Chaudron <echaudro@redhat.com>
Cc: Xdp <xdp-newbies@vger.kernel.org>, bpf <bpf@vger.kernel.org>
Subject: Re: Trying the bpf trace a bpf xdp program
Date: Thu, 28 Nov 2019 11:47:13 -0800
Message-ID: <CAADnVQJKSnoMVpQ3F86zBhFyo8WQ0vi65Z4QDtopLRrpK4yB8Q@mail.gmail.com> (raw)
In-Reply-To: <3AC9D2B7-9D2F-4286-80A2-1721B51B62CF@redhat.com>

On Thu, Nov 28, 2019 at 11:16 AM Eelco Chaudron <echaudro@redhat.com> wrote:
>
>
>
> On 28 Nov 2019, at 19:18, Alexei Starovoitov wrote:
>
> > On Thu, Nov 28, 2019 at 9:20 AM Eelco Chaudron <echaudro@redhat.com>
> > wrote:
> >>
> >> Trying out the BPF trace to trace a BPF program, but I’m already
> >> getting stuck loading the object with the fexit  :(
> >
> > I can take a look after holidays.
>
> Enjoy the Holidays!! I figured out my auto kernel install script failed
> whiteout me noticing, and I was running an old kernel :(
>
> I will try tomorrow with the correct kernel…

Please also check that you have the latest llvm and pahole.
pahole version should be >= 1.13.
clang ideally from master.
If all that is working then downgrade one by one and bisect whether the bug is.

>
> >> libbpf: load bpf program failed: Argument list too long
> >> libbpf: failed to load program 'fexit/xdp_prog_simple'
> >> libbpf: failed to load object './xdp_sample_fentry_fexit_kern.o'
> >> ERROR: Failed to load object file: Operation not permitted
> >
> > please add -vvv and share full output.
>

  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <E53E0693-1C3A-4B47-B205-DC8E5DAF3619@redhat.com>
2019-11-28 18:18 ` Alexei Starovoitov
2019-11-28 19:16   ` Eelco Chaudron
2019-11-28 19:47     ` Alexei Starovoitov [this message]
2019-11-29 16:30       ` Eelco Chaudron
2019-11-29 16:52         ` Yonghong Song
2019-12-02 16:34           ` Eelco Chaudron
2019-12-02 16:48             ` Yonghong Song
2019-12-04 13:19               ` Eelco Chaudron
2019-12-04 14:58                 ` Yonghong Song
2019-12-04 18:01                   ` Yonghong Song
2019-12-04 18:52                     ` Eelco Chaudron
2019-12-05 12:40                       ` Eelco Chaudron
2019-12-05 17:35                         ` Y Song
2019-12-06 13:04                           ` Eelco Chaudron
2019-12-07 16:51                             ` Alexei Starovoitov
2019-12-19 11:06                               ` Eelco Chaudron
2019-12-04 16:31                 ` Andrii Nakryiko
2019-12-04 18:03                   ` John Fastabend
2019-12-04 21:19                     ` Andrii Nakryiko

Reply instructions:

You may reply publically 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=CAADnVQJKSnoMVpQ3F86zBhFyo8WQ0vi65Z4QDtopLRrpK4yB8Q@mail.gmail.com \
    --to=alexei.starovoitov@gmail.com \
    --cc=bpf@vger.kernel.org \
    --cc=echaudro@redhat.com \
    --cc=xdp-newbies@vger.kernel.org \
    /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

BPF Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/bpf/0 bpf/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 bpf bpf/ https://lore.kernel.org/bpf \
		bpf@vger.kernel.org
	public-inbox-index bpf

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.bpf


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git