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Date: Wed, 12 Jun 2024 11:28:51 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: Wei Yang <richard.weiyang@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Masami
 Hiramatsu <mhiramat@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
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Subject: Re: [PATCH v2 1/2] mm/memblock: Add "reserve_mem" to reserved named
 memory at boot up
Message-ID: <20240612112851.17664dab@rorschach.local.home>
In-Reply-To: <20240612073049.xof3ciae2x5qjp6a@master>
References: <20240606150143.876469296@goodmis.org>
	<20240606150316.751642266@goodmis.org>
	<20240612073049.xof3ciae2x5qjp6a@master>
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On Wed, 12 Jun 2024 07:30:49 +0000
Wei Yang <richard.weiyang@gmail.com> wrote:

> >+/* Add wildcard region with a lookup name */
> >+static int __init reserved_mem_add(unsigned long start, unsigned long size,
> >+				   const char *name)
> >+{
> >+	struct reserve_mem_table *map;
> >+
> >+	if (!name || !name[0] || strlen(name) >= RESERVE_MEM_NAME_SIZE)
> >+		return -EINVAL;
> >+
> >+	if (reserved_mem_count >= RESERVE_MEM_MAX_ENTRIES)
> >+		return -1;  
> 
> Another thing come to my mind: could we specify several reserve_mem on the
> command line?

Yes, in fact I have this on my command line that I test with:

  reserve_mem=2M:0:oops ramoops.mem_name=oops ramoops.console_size=0x100000 reserve_mem=12M:4096:trace trace_instance=boot_mapped@trace


> 
> If so, we may need to check whether names conflict.

Yeah, I can add that.

Thanks,

-- Steve