From: akpm@linux-foundation.org (Andrew Morton)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 -next 3/5] arm: Add support for LZ4-compressed kernel
Date: Tue, 30 Apr 2013 13:56:02 -0700 [thread overview]
Message-ID: <20130430135602.2aa0d3b4ec392bf83a9b64d0@linux-foundation.org> (raw)
In-Reply-To: <1362484056-9778-4-git-send-email-kyungsik.lee@lge.com>
On Tue, 5 Mar 2013 20:47:34 +0900 Kyungsik Lee <kyungsik.lee@lge.com> wrote:
> This patch integrates the LZ4 decompression code to the arm pre-boot code.
> And it depends on two patchs below
>
> lib: Add support for LZ4-compressed kernel
> decompressor: Add LZ4 decompressor module
>
> ...
>
> - Apply CFLAGS, -Os to decompress.o to improve decompress
> performance during boot-up process
>
> ...
>
> --- a/arch/arm/boot/compressed/Makefile
> +++ b/arch/arm/boot/compressed/Makefile
> @@ -24,6 +24,9 @@ endif
> AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
> HEAD = head.o
> OBJS += misc.o decompress.o
> +ifeq ($(CONFIG_KERNEL_LZ4),y)
> +CFLAGS_decompress.o := -Os
> +endif
Surprised. You found that -Os produces faster code than -O2? Details,
please?
next prev parent reply other threads:[~2013-04-30 20:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-05 11:47 [PATCH v3 -next 0/5] Add support for LZ4-compressed kernel Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 1/5] decompressor: Add LZ4 decompressor module Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 2/5] lib: Add support for LZ4-compressed kernel Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 3/5] arm: " Kyungsik Lee
2013-04-30 20:56 ` Andrew Morton [this message]
2013-05-03 9:02 ` Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 4/5] x86: " Kyungsik Lee
2013-03-05 16:13 ` H. Peter Anvin
2013-03-06 6:37 ` Kyungsik Lee
2013-04-25 22:43 ` Andrew Morton
2013-03-05 11:47 ` [PATCH v3 -next 5/5] Kconfig: Make x86 and arm kernels default to the LZ4-compressed Kyungsik Lee
2013-03-05 11:58 ` Borislav Petkov
2013-03-05 12:04 ` Florian Fainelli
2013-03-05 23:08 ` Andrew Morton
2013-03-06 9:57 ` Florian Fainelli
2013-03-06 11:16 ` Borislav Petkov
2013-03-05 16:13 ` H. Peter Anvin
2013-03-05 23:06 ` [PATCH v3 -next 0/5] Add support for LZ4-compressed kernel Andrew Morton
2013-03-06 6:15 ` Kyungsik Lee
2013-03-08 6:39 ` Kyungsik Lee
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