From: abhja kaanlani <unidef_rogue@live.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
X86 ML <x86@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Network Development <netdev@vger.kernel.org>,
bpf <bpf@vger.kernel.org>, Peter Zijlstra <peterz@infradead.org>,
Song Liu <songliubraving@fb.com>, Kairui Song <kasong@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
"David Laight" <David.Laight@aculab.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v2 2/5] objtool: Fix ORC unwinding in non-JIT BPF generated code
Date: Sat, 15 Jun 2019 00:06:22 +0000 [thread overview]
Message-ID: <BYAPR02MB57042A4F3AAA334A6349643183E90@BYAPR02MB5704.namprd02.prod.outlook.com> (raw)
In-Reply-To: <20190615000242.e5tcogffvyuuhnrs@treble>
Maybe add more multidimensional arrays?
Sent from my iPhone
>> On Jun 14, 2019, at 5:02 PM, Josh Poimboeuf <jpoimboe@redhat.com> wrote:
>>
>>> On Fri, Jun 14, 2019 at 04:30:15PM -0700, Alexei Starovoitov wrote:
>>>> On Fri, Jun 14, 2019 at 4:17 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote:
>>>>
>>>> On Fri, Jun 14, 2019 at 02:22:59PM -0700, Alexei Starovoitov wrote:
>>>> On Fri, Jun 14, 2019 at 2:19 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote:
>>>>>>>>>
>>>>>>>>> +#define JUMP_TABLE_SYM_PREFIX "jump_table."
>>>>>>>>
>>>>>>>> since external tool will be looking at it should it be named
>>>>>>>> "bpf_jump_table." to avoid potential name conflicts?
>>>>>>>> Or even more unique name?
>>>>>>>> Like "bpf_interpreter_jump_table." ?
>>>>>>>
>>>>>>> No, the point is that it's a generic feature which can also be used any
>>>>>>> non-BPF code which might also have a jump table.
>>>>>>
>>>>>> and you're proposing to name all such jump tables in the kernel
>>>>>> as static foo jump_table[] ?
>>>>>
>>>>> That's the idea.
>>>>
>>>> Then it needs much wider discussion.
>>>
>>> Why would it need wider discussion? It only has one user. If you
>>> honestly believe that it will be controversial to require future users
>>> to call a static jump table "jump_table" then we can have that
>>> discussion when it comes up.
>>
>> It's clearly controversial.
>> I nacked it already on pointless name change
>> from "jumptable" to "jump_table" and now you're saying
>> that no one will complain about "jump_table" name
>> for all jump tables in the kernel that will ever appear?
>
> Let me get this straight. You're saying that "jumptable" and
> "bpf_interpreter_jump_table" are both acceptable.
>
> But NACK to "jump_table".
>
> Ok...
>
> --
> Josh
next prev parent reply other threads:[~2019-06-15 0:06 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 17:56 [PATCH v2 0/5] x86/bpf: unwinder fixes Josh Poimboeuf
2019-06-14 17:56 ` [PATCH v2 1/5] perf/x86: Always store regs->ip in perf_callchain_kernel() Josh Poimboeuf
2019-06-14 20:56 ` Alexei Starovoitov
2019-06-14 21:06 ` Josh Poimboeuf
2019-06-14 21:16 ` Steven Rostedt
2019-06-14 21:20 ` Song Liu
2019-06-14 17:56 ` [PATCH v2 2/5] objtool: Fix ORC unwinding in non-JIT BPF generated code Josh Poimboeuf
2019-06-14 20:58 ` Alexei Starovoitov
2019-06-14 21:07 ` Josh Poimboeuf
2019-06-14 21:09 ` Alexei Starovoitov
2019-06-14 21:19 ` Josh Poimboeuf
2019-06-14 21:22 ` Alexei Starovoitov
2019-06-14 23:17 ` Josh Poimboeuf
2019-06-14 23:30 ` Alexei Starovoitov
2019-06-15 0:02 ` Josh Poimboeuf
2019-06-15 0:06 ` abhja kaanlani [this message]
2019-06-15 0:07 ` Alexei Starovoitov
2019-06-17 14:57 ` David Laight
2019-06-14 17:56 ` [PATCH v2 3/5] x86/bpf: Move epilogue generation to a dedicated function Josh Poimboeuf
2019-06-14 17:56 ` [PATCH v2 4/5] x86/bpf: Fix 64-bit JIT frame pointer usage Josh Poimboeuf
2019-06-14 21:05 ` Alexei Starovoitov
2019-06-14 21:19 ` Josh Poimboeuf
2019-06-14 21:27 ` Alexei Starovoitov
2019-06-14 23:13 ` Josh Poimboeuf
2019-06-14 23:23 ` Alexei Starovoitov
2019-06-14 23:54 ` Josh Poimboeuf
2019-06-15 0:02 ` Alexei Starovoitov
2019-06-15 4:27 ` Josh Poimboeuf
2019-06-15 5:16 ` Alexei Starovoitov
2019-06-15 12:57 ` Josh Poimboeuf
2019-06-14 17:56 ` [PATCH v2 5/5] x86/unwind/orc: Fall back to using frame pointers for generated code Josh Poimboeuf
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