linux-kernel - Re: [PATCH v2] scripts/gdb: fix lx-dmesg when CONFIG_PRINTK

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Message-ID: <CAGNP_+Wkya-wn-ckAmCoC0Mda=3cBDi4vYeZj-9SWT0EF8ja4w@mail.gmail.com>
Date:   Fri, 11 Oct 2019 15:01:55 +0200
From:   Joel Colledge <joel.colledge@...bit.com>
To:     Leonard Crestez <leonard.crestez@....com>
Cc:     Jan Kiszka <jan.kiszka@...mens.com>,
        Kieran Bingham <kbingham@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] scripts/gdb: fix lx-dmesg when CONFIG_PRINTK_CALLER is set

On Fri, Oct 11, 2019 at 2:47 PM Leonard Crestez <leonard.crestez@....com> wrote:
> This struct printk_log is quite small, I wonder if it's possible to do a
> single read for each log entry? This might make lx-dmesg faster because
> of fewer roundtrips to gdbserver and jtag (or whatever backend you're
> using).

I think this is already covered. utils.read_memoryview uses
inferior.read_memory and I think that reads the entire log buffer at
once (at most 2 reads, one for each half).