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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
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Subject: Re: [PATCH v2 1/3] module: Rename module_alloc() to text_alloc() and move to kernel proper
Date: Wed, 15 Jul 2020 14:03:01 +0900	[thread overview]
Message-ID: <20200715140301.be04a47b1f0da4d6bec1cb84@kernel.org> (raw)
In-Reply-To: <20200714100345.38354010@oasis.local.home>

On Tue, 14 Jul 2020 10:03:45 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Tue, 14 Jul 2020 14:33:14 +0100
> Mark Rutland <mark.rutland@arm.com> wrote:
> 
> > > Should work for all cases. Yes, we might then want something like a per
> > > arch:
> > > 
> > > 	{BPF,FTRACE,KPROBE}_TEXT_TYPE  
> > 
> > ... at that point why not:
> > 
> >   text_alloc_ftrace();
> >   text_alloc_module();
> >   text_alloc_bpf();
> >   text_alloc_kprobe();
> 
> I don't know about bpf and kprobes, but for ftrace, the only place that
> it allocates text happens to be in arch specific code.
> 
> If you want something special for ftrace, you could just add your own
> function. But for x86, a text_alloc_immediate() would work.
> (BTW, I like the function names over the enums)

kprobes will need the text_alloc_immediate() too, since it will use
the trampoline buffer where jumps to/from kernel code/modules.

Thanks,

-- 
Masami Hiramatsu <mhiramat@kernel.org>

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  reply	other threads:[~2020-07-15  5:03 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-14  9:45 [PATCH v2 0/3] kprobes: Remove MODULE dependency Jarkko Sakkinen
2020-07-14  9:45 ` [PATCH v2 1/3] module: Rename module_alloc() to text_alloc() and move to kernel proper Jarkko Sakkinen
2020-07-14  9:50   ` Russell King - ARM Linux admin
2020-07-14 10:28   ` Will Deacon
2020-07-14 11:29     ` Peter Zijlstra
2020-07-14 12:19       ` Ard Biesheuvel
2020-07-14 13:01         ` Peter Zijlstra
2020-07-14 13:33           ` Mark Rutland
2020-07-14 13:47             ` Ard Biesheuvel
2020-07-14 14:03             ` Steven Rostedt
2020-07-15  5:03               ` Masami Hiramatsu [this message]
2020-07-14 16:31           ` Jarkko Sakkinen
2020-07-14 16:46             ` Peter Zijlstra
2020-07-15  8:15             ` David Laight
2020-07-14 16:42           ` Russell King - ARM Linux admin
2020-07-14 12:25       ` Jarkko Sakkinen
2020-07-14 13:56   ` Jessica Yu
2020-07-14 15:44     ` Steven Rostedt
2020-07-14 16:37     ` Jarkko Sakkinen
2020-07-16 16:49   ` Christophe Leroy
2020-07-23  1:51     ` Jarkko Sakkinen
2020-07-23 12:42       ` Ard Biesheuvel
2020-07-24  7:36         ` Jarkko Sakkinen
2020-07-24  8:05           ` Jessica Yu
2020-07-24 15:46             ` Jarkko Sakkinen

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