linux-kernel - Re: [PATCH v2] kbuild: Enable armthumb BCJ filter for Thumb-2 kernel

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Date:   Sat, 26 Mar 2022 20:35:16 +0200
From:   Lasse Collin <lasse.collin@...aani.org>
To:     Jubin Zhong <zhongjubin@...wei.com>
Cc:     <akpm@...ux-foundation.org>, <liaohua4@...wei.com>,
        <linux-kernel@...r.kernel.org>, <wangfangpeng1@...wei.com>
Subject: Re: [PATCH v2] kbuild: Enable armthumb BCJ filter for Thumb-2
 kernel

On 2022-03-21 Jubin Zhong wrote:
> >On 2021-11-20 Jubin Zhong wrote:  
> >> xz_wrap.sh use $SRCARCH to detect the BCJ filter. However,
> >> assigning arm BCJ filter to Thumb-2 kernel is not optimal. In my
> >> case, about 5% decrease of image size is observed with armthumb
> >> BCJ filter:
> >> 
> >> Test results:
> >>   hardware:      QEMU emulator version 3.1.0
> >>   config:        vexpress_defconfig with THUMB2_KERNEL & KERNEL_XZ
> >> on
> >>   arm BCJ:       4029808
> >>   armthumb BCJ:  3827280
> >> 
> >> Choose armthumb BCJ filter for Thumb-2 kernel to make smaller
> >> images.
> >> 
> >> Signed-off-by: Jubin Zhong <zhongjubin@...wei.com>  
> 
> >I still didn't test it but it looks good to me.  
> 
> Hi, this patch is not accepted into the kernel mainline yet.
> Please let me know if there is any problem with the patch, thanks.

I see no replies and don't know what could be wrong. So perhaps you
could resend it with my Acked-by.

-- 
Lasse Collin