From: Oscar Salvador <osalvador@suse.de>
To: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Jason Wang <jasowang@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
virtualization@lists.linux-foundation.org, linux-mm@kvack.org,
Paul Mackerras <paulus@samba.org>,
linux-kselftest@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Shuah Khan <shuah@kernel.org>, Alex Shi <alexs@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
x86@kernel.org, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rafael@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org, Mike Rapoport <rppt@kernel.org>
Subject: Re: [PATCH v1 6/6] x86: remove memory hotplug support on X86_32
Date: Thu, 7 Oct 2021 11:15:58 +0200 [thread overview]
Message-ID: <YV66zoLEP3niIHEu@localhost.localdomain> (raw)
In-Reply-To: <20210929143600.49379-7-david@redhat.com>
On Wed, Sep 29, 2021 at 04:36:00PM +0200, David Hildenbrand wrote:
> CONFIG_MEMORY_HOTPLUG was marked BROKEN over one year and we just
> restricted it to 64 bit. Let's remove the unused x86 32bit implementation
> and simplify the Kconfig.
>
> Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
> ---
> arch/x86/Kconfig | 6 +++---
> arch/x86/mm/init_32.c | 31 -------------------------------
> 2 files changed, 3 insertions(+), 34 deletions(-)
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index ab83c22d274e..85f4762429f1 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -62,7 +62,7 @@ config X86
> select ARCH_32BIT_OFF_T if X86_32
> select ARCH_CLOCKSOURCE_INIT
> select ARCH_ENABLE_HUGEPAGE_MIGRATION if X86_64 && HUGETLB_PAGE && MIGRATION
> - select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64 || (X86_32 && HIGHMEM)
> + select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64
> select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
> select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE)
> select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE
> @@ -1615,7 +1615,7 @@ config ARCH_SELECT_MEMORY_MODEL
>
> config ARCH_MEMORY_PROBE
> bool "Enable sysfs memory/probe interface"
> - depends on X86_64 && MEMORY_HOTPLUG
> + depends on MEMORY_HOTPLUG
> help
> This option enables a sysfs memory/probe interface for testing.
> See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
> @@ -2395,7 +2395,7 @@ endmenu
>
> config ARCH_HAS_ADD_PAGES
> def_bool y
> - depends on X86_64 && ARCH_ENABLE_MEMORY_HOTPLUG
> + depends on ARCH_ENABLE_MEMORY_HOTPLUG
>
> config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
> def_bool y
> diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
> index bd90b8fe81e4..5cd7ea6d645c 100644
> --- a/arch/x86/mm/init_32.c
> +++ b/arch/x86/mm/init_32.c
> @@ -779,37 +779,6 @@ void __init mem_init(void)
> test_wp_bit();
> }
>
> -#ifdef CONFIG_MEMORY_HOTPLUG
> -int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_params *params)
> -{
> - unsigned long start_pfn = start >> PAGE_SHIFT;
> - unsigned long nr_pages = size >> PAGE_SHIFT;
> - int ret;
> -
> - /*
> - * The page tables were already mapped at boot so if the caller
> - * requests a different mapping type then we must change all the
> - * pages with __set_memory_prot().
> - */
> - if (params->pgprot.pgprot != PAGE_KERNEL.pgprot) {
> - ret = __set_memory_prot(start, nr_pages, params->pgprot);
> - if (ret)
> - return ret;
> - }
> -
> - return __add_pages(nid, start_pfn, nr_pages, params);
> -}
> -
> -void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> -{
> - unsigned long start_pfn = start >> PAGE_SHIFT;
> - unsigned long nr_pages = size >> PAGE_SHIFT;
> -
> - __remove_pages(start_pfn, nr_pages, altmap);
> -}
> -#endif
> -
> int kernel_set_to_readonly __read_mostly;
>
> static void mark_nxdata_nx(void)
> --
> 2.31.1
>
>
--
Oscar Salvador
SUSE Labs
next prev parent reply other threads:[~2021-10-07 9:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-29 14:35 [PATCH v1 0/6] mm/memory_hotplug: Kconfig and 32 bit cleanups David Hildenbrand
2021-09-29 14:35 ` [PATCH v1 1/6] mm/memory_hotplug: remove CONFIG_X86_64_ACPI_NUMA dependency from CONFIG_MEMORY_HOTPLUG David Hildenbrand
2021-10-07 8:09 ` Oscar Salvador
2021-09-29 14:35 ` [PATCH v1 2/6] mm/memory_hotplug: remove CONFIG_MEMORY_HOTPLUG_SPARSE David Hildenbrand
2021-10-05 13:43 ` Greg Kroah-Hartman
2021-10-05 14:22 ` Shuah Khan
2021-10-07 8:20 ` Oscar Salvador
2021-09-29 14:35 ` [PATCH v1 3/6] mm/memory_hotplug: restrict CONFIG_MEMORY_HOTPLUG to 64 bit David Hildenbrand
2021-10-07 9:02 ` Oscar Salvador
2021-09-29 14:35 ` [PATCH v1 4/6] mm/memory_hotplug: remove HIGHMEM leftovers David Hildenbrand
2021-10-07 9:13 ` Oscar Salvador
2021-09-29 14:35 ` [PATCH v1 5/6] mm/memory_hotplug: remove stale function declarations David Hildenbrand
2021-10-07 9:14 ` Oscar Salvador
2021-09-29 14:36 ` [PATCH v1 6/6] x86: remove memory hotplug support on X86_32 David Hildenbrand
2021-10-07 9:15 ` Oscar Salvador [this message]
2021-10-07 9:27 ` David Hildenbrand
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YV66zoLEP3niIHEu@localhost.localdomain \
--to=osalvador@suse.de \
--cc=akpm@linux-foundation.org \
--cc=alexs@kernel.org \
--cc=bp@alien8.de \
--cc=corbet@lwn.net \
--cc=dave.hansen@linux.intel.com \
--cc=david@redhat.com \
--cc=gregkh@linuxfoundation.org \
--cc=hpa@zytor.com \
--cc=jasowang@redhat.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=luto@kernel.org \
--cc=mhocko@suse.com \
--cc=mingo@redhat.com \
--cc=mst@redhat.com \
--cc=paulus@samba.org \
--cc=peterz@infradead.org \
--cc=rafael@kernel.org \
--cc=rppt@kernel.org \
--cc=shuah@kernel.org \
--cc=tglx@linutronix.de \
--cc=virtualization@lists.linux-foundation.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).