All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vlastimil Babka <vbabka@suse.cz>
To: Matthew Wilcox <willy@infradead.org>, linux-mm@kvack.org
Cc: "Matthew Wilcox" <mawilcox@microsoft.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	"Christoph Lameter" <cl@linux.com>,
	"Lai Jiangshan" <jiangshanlai@gmail.com>,
	"Pekka Enberg" <penberg@kernel.org>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"Jérôme Glisse" <jglisse@redhat.com>
Subject: Re: [PATCH v5 12/17] mm: Add pt_mm to struct page
Date: Tue, 15 May 2018 11:27:25 +0200	[thread overview]
Message-ID: <89ea9412-22fe-d08c-718c-15bc816ec47c@suse.cz> (raw)
In-Reply-To: <20180504183318.14415-13-willy@infradead.org>

On 05/04/2018 08:33 PM, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@microsoft.com>
> 
> x86 overloads the page->index field to store a pointer to the mm_struct.

Maybe start the sentence with "For page table pages, ..." or "For pgd
page table pages, ..." ?

> Rename this to pt_mm so it's visible to other users.
> 
> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

Also a suggestion below, otherwise:

Acked-by: Vlastimil Babka <vbabka@suse.cz>

>  static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
> diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> index 90a6dbeeef11..5a519279dcd5 100644
> --- a/include/linux/mm_types.h
> +++ b/include/linux/mm_types.h
> @@ -139,7 +139,7 @@ struct page {
>  			unsigned long _pt_pad_1;	/* compound_head */
>  			pgtable_t pmd_huge_pte; /* protected by page->ptl */
>  			unsigned long _pt_pad_2;	/* mapping */
> -			unsigned long _pt_pad_3;
> +			struct mm_struct *pt_mm;

Add comment that it's x86-only so somebody doesn't try to write a
generic code expecting it?

>  #if ALLOC_SPLIT_PTLOCKS
>  			spinlock_t *ptl;
>  #else
> 

  reply	other threads:[~2018-05-15  9:27 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-04 18:33 [PATCH v5 00/17] Rearrange " Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 01/17] s390: Use _refcount for pgtables Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 02/17] mm: Split page_type out from _mapcount Matthew Wilcox
2018-05-14 14:33   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 03/17] mm: Mark pages in use for page tables Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 04/17] mm: Switch s_mem and slab_cache in struct page Matthew Wilcox
2018-05-07 14:58   ` Christopher Lameter
2018-05-14 14:37   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 05/17] mm: Move 'private' union within " Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 06/17] mm: Move _refcount out of struct page union Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 07/17] mm: Combine first three unions in struct page Matthew Wilcox
2018-05-14 14:42   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 08/17] mm: Use page->deferred_list Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 09/17] mm: Move lru union within struct page Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 10/17] mm: Combine LRU and main union in " Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 11/17] mm: Improve struct page documentation Matthew Wilcox
2018-05-15  9:22   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 12/17] mm: Add pt_mm to struct page Matthew Wilcox
2018-05-15  9:27   ` Vlastimil Babka [this message]
2018-05-15 12:23     ` Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 13/17] mm: Add hmm_data " Matthew Wilcox
2018-05-15  9:32   ` Vlastimil Babka
2018-05-15 12:40     ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 14/17] slab,slub: Remove rcu_head size checks Matthew Wilcox
2018-05-15 11:30   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 15/17] slub: Remove kmem_cache->reserved Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 16/17] slub: Remove 'reserved' file from sysfs Matthew Wilcox
2018-05-07 15:01   ` Christopher Lameter
2018-05-04 18:33 ` [PATCH v5 17/17] mm: Distinguish VMalloc pages Matthew Wilcox
2018-05-04 20:52 ` [PATCH v5 00/17] Rearrange struct page Andrew Morton
2018-05-04 21:25   ` Matthew Wilcox

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=89ea9412-22fe-d08c-718c-15bc816ec47c@suse.cz \
    --to=vbabka@suse.cz \
    --cc=akpm@linux-foundation.org \
    --cc=cl@linux.com \
    --cc=dave.hansen@linux.intel.com \
    --cc=jglisse@redhat.com \
    --cc=jiangshanlai@gmail.com \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=linux-mm@kvack.org \
    --cc=mawilcox@microsoft.com \
    --cc=penberg@kernel.org \
    --cc=willy@infradead.org \
    --subject='Re: [PATCH v5 12/17] mm: Add pt_mm to struct page' \
    /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

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.