Re: [PATCH] MIPS: Loongson: Make default kernel log buffer size as 128KB for Loongson3

[Tiezhu Yang]

On 10/15/2019 11:36 AM, Huacai Chen wrote:
> On Tue, Oct 15, 2019 at 10:12 AM Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> wrote:
> > When I update kernel with loongson3_defconfig based on the Loongson 3A3000
> > platform, then using dmesg command to show kernel ring buffer, the initial
> > kernel messages have disappeared due to the log buffer is too small, it is
> > better to change the default kernel log buffer size from 16KB to 128KB.
> >
> > Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
> > ---
> >   arch/mips/configs/loongson3_defconfig | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/mips/configs/loongson3_defconfig b/arch/mips/configs/loongson3_defconfig
> > index 90ee008..3aa2201 100644
> > --- a/arch/mips/configs/loongson3_defconfig
> > +++ b/arch/mips/configs/loongson3_defconfig
> > @@ -12,7 +12,7 @@ CONFIG_TASKSTATS=y
> >   CONFIG_TASK_DELAY_ACCT=y
> >   CONFIG_TASK_XACCT=y
> >   CONFIG_TASK_IO_ACCOUNTING=y
> > -CONFIG_LOG_BUF_SHIFT=14
> > +CONFIG_LOG_BUF_SHIFT=17
> Hi, Tiezhu,
>
> Why you choose 128KB but not 64KB or 256KB? I found 64KB is enough for
> our cases. And if you really need more, I think 256KB could be better
> because there are many platforms choose 256KB.

Hi Huacai,

Thanks for your reply and suggestion, I will send a v2 patch.

Thanks,

Tiezhu Yang

> Huacai
>
> >   CONFIG_MEMCG=y
> >   CONFIG_MEMCG_SWAP=y
> >   CONFIG_BLK_CGROUP=y
> > --
> > 2.1.0