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Message-Id: <20180410025912.49830-1-zoucao@linux.alibaba.com> Date: Tue, 10 Apr 2018 10:59:11 +0800 From: zoucao@...ux.alibaba.com To: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com Cc: x86@...nel.org, linux-kernel@...r.kernel.org Subject: [PATCH V2] x86/boot/e820: add new chareater - to free BIOS memory in memmap bootargs this is useing memmap=0x4101000-0x6aeff000 to free BIOS reserved memory "6aeff000-6effffff : reserved": ...... 00100000-6aefefff : System RAM 01000000-0165537a : Kernel code 0165537b-01a8873f : Kernel data 01c31000-01f4efff : Kernel bss 28000000-320fffff : Crash kernel 6aeff000-6effffff : reserved --> it is e820 reserved memory 6f000000-78240fff : System RAM ...... add bootargs memmap=0x4101000-0x6aeff000, to free memory region: 6aeff000-6effffff then 6aeff000-6effffff will be merged into 00100000-78240fff. new iomem: cat /proc/iomem: ...... 00100000-78240fff : System RAM 01000000-0165537a : Kernel code 0165537b-01a8873f : Kernel data 01c31000-01f4efff : Kernel bss ...... V1>V2: fixed the wrong chareaters zoucao (1): x86/boot/e820: add new chareater "-" to free BIOS memory in memmap bootargs 7u/Documentation/kernel-parameters.txt | 6 ++++++ 7u/arch/x86/kernel/e820.c | 3 +++ 2 files changed, 9 insertions(+)
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