From: Baoquan He <bhe@redhat.com>
To: Chao Fan <fanc.fnst@cn.fujitsu.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
linux-efi@vger.kernel.org, linux-acpi@vger.kernel.org,
bp@alien8.de, tglx@linutronix.de, mingo@redhat.com,
hpa@zytor.com, keescook@chromium.org, msys.mizuma@gmail.com,
indou.takao@jp.fujitsu.com, caoj.fnst@cn.fujitsu.com
Subject: Re: [PATCH v9 8/8] x86/boot/KASLR: Limit kaslr to choosing the immovable memory
Date: Mon, 22 Oct 2018 18:24:55 +0800 [thread overview]
Message-ID: <20181022102455.GN1885@192.168.1.4> (raw)
In-Reply-To: <20181022101329.GC7641@localhost.localdomain>
On 10/22/18 at 06:13pm, Chao Fan wrote:
> >> +static bool process_mem_region(struct mem_vector *region,
> >> + unsigned long long minimum,
> >> + unsigned long long image_size)
> >> +{
> >> + int i;
> >> + /*
> >> + * If no immovable memory found, or MEMORY_HOTREMOVE disabled,
> >> + * walk all the regions, so use region directely.
> >> + */
> >> + if (num_immovable_mem == 0) {
> >> + slots_count(region, minimum, image_size);
> >> +
> >> + if (slot_area_index == MAX_SLOT_AREA) {
> >> + debug_putstr("Aborted e820/efi memmap scan (slot_areas full)!\n");
> >> + return 1;
> >> + }
> >> + return 0;
> >> + }
> >> +
> >> +#ifdef CONFIG_MEMORY_HOTREMOVE
> >> + /*
> >> + * If immovable memory found, filter the intersection between
> >> + * immovable memory and region to slots_count.
> >> + * Otherwise, go on old code.
> >
> >Could you explain more about what is the old code in otherwise case you
> >want to go on?
>
> Sure,
> 1. 'movable_node' not specified in cmdline.
> 2. CONFIG_HOT_REMOVE not difned.
> 3. Just one node in this machine.
So these cases are not covered by 'if (num_immovable_mem == 0)' code?
In thise ifdef code block, where do you handle above three cases?
Thanks
Baoquan
next prev parent reply other threads:[~2018-10-22 10:25 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-17 10:20 [PATCH v9 0/8] x86/boot/KASLR: Parse ACPI table and limit kaslr in immovable memory Chao Fan
2018-10-17 10:20 ` [PATCH v9 1/8] x86/boot: Introduce cmdline_find_option_arg()to detect if option=arg in cmdline Chao Fan
2018-10-18 4:01 ` Baoquan He
2018-10-18 6:15 ` Chao Fan
2018-10-17 10:20 ` [PATCH v9 2/8] x86/boot: Copy kstrtoull() to compressed period Chao Fan
2018-10-18 4:03 ` Baoquan He
2018-10-18 5:51 ` Chao Fan
2018-10-18 6:01 ` Baoquan He
2018-10-18 6:08 ` Chao Fan
2018-10-17 10:20 ` [PATCH v9 3/8] x86/boot: Add efi_get_rsdp_addr() to dig out RSDP from EFI table Chao Fan
2018-10-18 4:35 ` Baoquan He
2018-10-18 5:54 ` Chao Fan
2018-10-18 5:56 ` Baoquan He
2018-10-18 6:10 ` Chao Fan
2018-10-17 10:20 ` [PATCH v9 4/8] x86/boot: Add bios_get_rsdp_addr() to search RSDP in memory Chao Fan
2018-10-17 10:20 ` [PATCH v9 5/8] x86/boot: Add get_acpi_rsdp() to parse RSDP in cmdlien from kexec Chao Fan
2018-10-21 2:26 ` Baoquan He
2018-10-22 5:30 ` Fan, Chao
2018-10-22 6:06 ` Baoquan He
2018-10-22 7:30 ` Chao Fan
2018-10-22 7:36 ` Baoquan He
2018-10-17 10:20 ` [PATCH v9 6/8] x86/boot: Dig out SRAT table from RSDP and find immovable memory Chao Fan
2018-10-18 6:12 ` Chao Fan
2018-10-21 2:34 ` Baoquan He
2018-10-22 5:29 ` Fan, Chao
2018-10-22 6:08 ` Baoquan He
2018-10-17 10:20 ` [PATCH v9 7/8] x86/boot/KASLR: Walk srat tables to filter " Chao Fan
2018-10-18 4:23 ` Baoquan He
2018-10-18 5:56 ` Chao Fan
2018-10-17 10:20 ` [PATCH v9 8/8] x86/boot/KASLR: Limit kaslr to choosing the " Chao Fan
2018-10-18 4:21 ` Baoquan He
2018-10-22 10:13 ` Chao Fan
2018-10-22 10:24 ` Baoquan He [this message]
2018-10-22 10:49 ` Chao Fan
2018-10-18 3:59 ` [PATCH v9 0/8] x86/boot/KASLR: Parse ACPI table and limit kaslr in " Baoquan He
2018-10-18 5:48 ` Chao Fan
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