From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org,
Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
"David S. Miller" <davem@davemloft.net>,
Ingo Molnar <mingo@redhat.com>, Jakub Kicinski <kuba@kernel.org>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>, Yonghong Song <yhs@fb.com>
Subject: Re: [PATCH net] xdp: xdp_mem_allocator can be NULL in trace_mem_connect().
Date: Mon, 07 Mar 2022 19:07:37 +0100 [thread overview]
Message-ID: <87sfrt7i1i.fsf@toke.dk> (raw)
In-Reply-To: <YiZIEVTRMQVYe8DP@linutronix.de>
Sebastian Andrzej Siewior <bigeasy@linutronix.de> writes:
> On 2022-03-07 17:50:04 [+0100], Toke Høiland-Jørgensen wrote:
>>
>> Right, looking at the code again, the id is only assigned in the path
>> that doesn't return NULL from __xdp_reg_mem_model().
>>
>> Given that the trace points were put in specifically to be able to pair
>> connect/disconnect using the IDs, I don't think there's any use to
>> creating the events if there's no ID, so I think we should fix it by
>> skipping the trace event entirely if xdp_alloc is NULL.
>
> This sounds like a reasonable explanation. If nobody disagrees then I
> post a new patch tomorrow and try to recycle some of what you wrote :)
SGTM :)
-Toke
next prev parent reply other threads:[~2022-03-07 18:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-03 12:26 [PATCH net] xdp: xdp_mem_allocator can be NULL in trace_mem_connect() Sebastian Andrzej Siewior
2022-03-03 13:59 ` Toke Høiland-Jørgensen
2022-03-03 14:12 ` Sebastian Andrzej Siewior
2022-03-03 17:31 ` Jesper Dangaard Brouer
2022-03-07 16:50 ` Toke Høiland-Jørgensen
2022-03-07 17:59 ` Sebastian Andrzej Siewior
2022-03-07 18:07 ` Toke Høiland-Jørgensen [this message]
2022-03-09 17:15 ` Jakub Kicinski
2022-03-09 20:48 ` Sebastian Andrzej Siewior
2022-03-09 21:03 ` Jakub Kicinski
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=87sfrt7i1i.fsf@toke.dk \
--to=toke@redhat.com \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=bigeasy@linutronix.de \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=hawk@kernel.org \
--cc=john.fastabend@gmail.com \
--cc=kafai@fb.com \
--cc=kpsingh@kernel.org \
--cc=kuba@kernel.org \
--cc=mingo@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=rostedt@goodmis.org \
--cc=songliubraving@fb.com \
--cc=tglx@linutronix.de \
--cc=yhs@fb.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).