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Message-ID: <CA+7wUsy7X_3ST0hgnyxWMiC45ZeM8A_oafzn9PuufETkcKN+Xw@mail.gmail.com> Date: Thu, 14 Sep 2017 21:17:42 +0200 From: Mathieu Malaterre <malat@...ian.org> To: "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "stable@...r.kernel.org" <stable@...r.kernel.org>, Marcin Nowakowski <marcin.nowakowski@...tec.com>, "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>, Ralf Baechle <ralf@...ux-mips.org> Subject: Re: [PATCH for 4.9 11/59] MIPS: fix mem=X@Y commandline processing On Thu, Sep 14, 2017 at 9:11 PM, Levin, Alexander (Sasha Levin) <alexander.levin@...izon.com> wrote: > On Thu, Sep 14, 2017 at 08:59:05PM +0200, Mathieu Malaterre wrote: >>On Thu, Sep 14, 2017 at 5:51 PM, Levin, Alexander (Sasha Levin) >><alexander.levin@...izon.com> wrote: >>> From: Marcin Nowakowski <marcin.nowakowski@...tec.com> >>> >>> [ Upstream commit 73fbc1eba7ffa3bf0ad12486232a8a1edb4e4411 ] >>> >>> When a memory offset is specified through the commandline, add the >>> memory in range PHYS_OFFSET:Y as reserved memory area. >>> Otherwise the bootmem allocator is initialised with low page equal to >>> min_low_pfn = PHYS_OFFSET, and in free_all_bootmem will process pages >>> starting from min_low_pfn instead of PFN(Y). >>> >>> Signed-off-by: Marcin Nowakowski <marcin.nowakowski@...tec.com> >>> Cc: linux-mips@...ux-mips.org >>> Patchwork: https://urldefense.proofpoint.com/v2/url?u=https-3A__patchwork.linux-2Dmips.org_patch_14613_&d=DwIBaQ&c=udBTRvFvXC5Dhqg7UHpJlPps3mZ3LRxpb6__0PomBTQ&r=bUtaaC9mlBij4OjEG_D-KPul_335azYzfC4Rjgomobo&m=6siOw0e29CYMhuJcboVwEeX-LcC1yJjtnGPVl_1tClQ&s=rP-QGn8HHjuow4b4qd6sfl_EEPoAKkxAffkh1zEq-kc&e= >>> Signed-off-by: Ralf Baechle <ralf@...ux-mips.org> >>> Signed-off-by: Sasha Levin <alexander.levin@...izon.com> >>> --- >>> arch/mips/kernel/setup.c | 4 ++++ >>> 1 file changed, 4 insertions(+) >>> >>> diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c >>> index f66e5ce505b2..38697f25d168 100644 >>> --- a/arch/mips/kernel/setup.c >>> +++ b/arch/mips/kernel/setup.c >>> @@ -589,6 +589,10 @@ static int __init early_parse_mem(char *p) >>> start = memparse(p + 1, &p); >>> >>> add_memory_region(start, size, BOOT_MEM_RAM); >>> + >>> + if (start && start > PHYS_OFFSET) >>> + add_memory_region(PHYS_OFFSET, start - PHYS_OFFSET, >>> + BOOT_MEM_RESERVED); >>> return 0; >>> } >>> early_param("mem", early_parse_mem); >> >>Does not work on MIPS Creator CI20. See: > > Hm, so upstream is actually broken right now? Yes, at least on Creator CI20. You need to clear out all your mem=X@Y from your boot command line, or apply the new patch I mentionned above, or revert 73fbc1eba7ffa3bf0ad12486232a8a1edb4e4411.
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