From: "Luck, Tony" <tony.luck@intel.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>,
Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"kirill.shutemov@linux.intel.com"
<kirill.shutemov@linux.intel.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
"iamjoonsoo.kim@lge.com" <iamjoonsoo.kim@lge.com>,
"mgorman@techsingularity.net" <mgorman@techsingularity.net>,
"vbabka@suse.cz" <vbabka@suse.cz>,
"mhocko@kernel.org" <mhocko@kernel.org>,
"hillf.zj@alibaba-inc.com" <hillf.zj@alibaba-inc.com>,
"hughd@google.com" <hughd@google.com>,
"oleg@redhat.com" <oleg@redhat.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"riel@redhat.com" <riel@redhat.com>,
"srikar@linux.vnet.ibm.com" <srikar@linux.vnet.ibm.com>,
"vdavydov.dev@gmail.com" <vdavydov.dev@gmail.com>,
"mingo@kernel.org" <mingo@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"x86@kernel.org" <x86@kernel.org>
Subject: RE: [mm 4.15-rc8] Random oopses under memory pressure.
Date: Thu, 18 Jan 2018 17:26:15 +0000 [thread overview]
Message-ID: <3908561D78D1C84285E8C5FCA982C28F7B3446FC@ORSMSX110.amr.corp.intel.com> (raw)
In-Reply-To: <20180118165629.kpdkezarsf4qymnw@node.shutemov.name>
> Both are real page. But why do you expect pages to be 64-byte alinged?
> Both are aligned to 64-bit as they suppose to be IIUC.
On a 64-bit kernel sizeof struct page == 64 (after much work by people to
trim out excess stuff). So I thought we made sure to align the base address
of blocks of "struct page" so that every one neatly fits into one cache line.
-Tony
WARNING: multiple messages have this Message-ID (diff)
From: "Luck, Tony" <tony.luck@intel.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>,
Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"kirill.shutemov@linux.intel.com"
<kirill.shutemov@linux.intel.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
"iamjoonsoo.kim@lge.com" <iamjoonsoo.kim@lge.com>,
"mgorman@techsingularity.net" <mgorman@techsingularity.net>,
"vbabka@suse.cz" <vbabka@suse.cz>,
"mhocko@kernel.org" <mhocko@kernel.org>,
"hillf.zj@alibaba-inc.com" <hillf.zj@alibaba-inc.com>,
"hughd@google.com" <hughd@google.com>,
"oleg@redhat.com" <oleg@redhat.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"riel@redhat.com" <riel@redhat.com>,
"srikar@linux.vnet.ibm.com" <srikar@linux.vnet.ibm.com>,
"vdavydov.dev@gmail.com" <vdavydov.dev@gmail.com>,
"mingo@kernel.org" <mingo@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"x86@kernel.org" <x86@kernel.org>
Subject: RE: [mm 4.15-rc8] Random oopses under memory pressure.
Date: Thu, 18 Jan 2018 17:26:15 +0000 [thread overview]
Message-ID: <3908561D78D1C84285E8C5FCA982C28F7B3446FC@ORSMSX110.amr.corp.intel.com> (raw)
In-Reply-To: <20180118165629.kpdkezarsf4qymnw@node.shutemov.name>
> Both are real page. But why do you expect pages to be 64-byte alinged?
> Both are aligned to 64-bit as they suppose to be IIUC.
On a 64-bit kernel sizeof struct page == 64 (after much work by people to
trim out excess stuff). So I thought we made sure to align the base address
of blocks of "struct page" so that every one neatly fits into one cache line.
-Tony
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next prev parent reply other threads:[~2018-01-18 17:26 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-05 14:45 [x86? mm? fs? 4.15-rc6] Random oopses by simple write under memory pressure Tetsuo Handa
2018-01-09 10:39 ` [mm? 4.15-rc7] " Tetsuo Handa
2018-01-10 11:49 ` [mm? 4.15-rc7] Random oopses " Tetsuo Handa
2018-01-10 12:45 ` Michal Hocko
2018-01-10 13:37 ` Tetsuo Handa
2018-01-11 13:57 ` Michal Hocko
2018-01-11 14:11 ` Tetsuo Handa
2018-01-11 14:21 ` Michal Hocko
2018-01-11 14:37 ` Tetsuo Handa
2018-01-12 1:31 ` [mm " Tetsuo Handa
2018-01-12 1:42 ` Linus Torvalds
2018-01-12 11:22 ` Tetsuo Handa
2018-01-14 11:54 ` Tetsuo Handa
2018-01-14 11:54 ` Tetsuo Handa
2018-01-15 23:05 ` Linus Torvalds
2018-01-15 23:05 ` Linus Torvalds
2018-01-16 1:15 ` [mm 4.15-rc8] " Tetsuo Handa
2018-01-16 1:15 ` Tetsuo Handa
2018-01-16 2:14 ` Linus Torvalds
2018-01-16 2:14 ` Linus Torvalds
2018-01-16 8:06 ` Dave Hansen
2018-01-16 8:06 ` Dave Hansen
2018-01-16 8:37 ` Ingo Molnar
2018-01-16 8:37 ` Ingo Molnar
2018-01-16 19:30 ` Linus Torvalds
2018-01-16 19:30 ` Linus Torvalds
2018-01-16 17:33 ` Tetsuo Handa
2018-01-16 17:33 ` Tetsuo Handa
2018-01-16 19:34 ` Linus Torvalds
2018-01-16 19:34 ` Linus Torvalds
2018-01-17 11:08 ` Tetsuo Handa
2018-01-17 11:08 ` Tetsuo Handa
2018-01-17 21:39 ` Linus Torvalds
2018-01-17 21:39 ` Linus Torvalds
2018-01-17 21:51 ` Linus Torvalds
2018-01-17 21:51 ` Linus Torvalds
2018-01-17 22:04 ` Dave Hansen
2018-01-17 22:04 ` Dave Hansen
2018-01-17 22:00 ` Dave Hansen
2018-01-17 22:00 ` Dave Hansen
2018-01-17 22:15 ` Linus Torvalds
2018-01-17 22:15 ` Linus Torvalds
2018-01-18 8:12 ` Tetsuo Handa
2018-01-18 8:12 ` Tetsuo Handa
2018-01-18 12:25 ` Kirill A. Shutemov
2018-01-18 12:25 ` Kirill A. Shutemov
2018-01-18 13:12 ` Kirill A. Shutemov
2018-01-18 13:12 ` Kirill A. Shutemov
2018-01-18 14:34 ` Kirill A. Shutemov
2018-01-18 14:34 ` Kirill A. Shutemov
2018-01-18 14:38 ` Dave Hansen
2018-01-18 14:38 ` Dave Hansen
2018-01-18 14:45 ` Kirill A. Shutemov
2018-01-18 14:45 ` Kirill A. Shutemov
2018-01-18 14:51 ` Dave Hansen
2018-01-18 14:51 ` Dave Hansen
2018-01-18 16:58 ` Linus Torvalds
2018-01-18 16:58 ` Linus Torvalds
2018-01-18 14:45 ` Dave Hansen
2018-01-18 14:45 ` Dave Hansen
2018-01-18 14:58 ` Andrea Arcangeli
2018-01-18 14:58 ` Andrea Arcangeli
2018-01-18 16:56 ` Kirill A. Shutemov
2018-01-18 16:56 ` Kirill A. Shutemov
2018-01-18 17:26 ` Luck, Tony [this message]
2018-01-18 17:26 ` Luck, Tony
2018-01-18 17:28 ` Linus Torvalds
2018-01-18 17:28 ` Linus Torvalds
2018-01-18 17:26 ` Linus Torvalds
2018-01-18 17:26 ` Linus Torvalds
2018-01-18 23:49 ` Kirill A. Shutemov
2018-01-18 23:49 ` Kirill A. Shutemov
2018-01-19 12:55 ` Matthew Wilcox
2018-01-19 12:55 ` Matthew Wilcox
2018-01-19 18:42 ` Linus Torvalds
2018-01-19 18:42 ` Linus Torvalds
2018-01-19 22:12 ` Al Viro
2018-01-19 22:12 ` Al Viro
2018-01-19 22:53 ` Linus Torvalds
2018-01-19 22:53 ` Linus Torvalds
2018-01-20 2:02 ` Al Viro
2018-01-20 2:02 ` Al Viro
2018-01-20 5:24 ` Al Viro
2018-01-20 5:24 ` Al Viro
2018-01-20 9:38 ` Luc Van Oostenryck
2018-01-20 9:38 ` Luc Van Oostenryck
2018-01-20 9:38 ` Luc Van Oostenryck
2018-01-20 14:45 ` Luc Van Oostenryck
2018-01-22 13:26 ` Rasmus Villemoes
2018-01-22 19:58 ` Linus Torvalds
2018-01-18 15:40 ` Kirill A. Shutemov
2018-01-18 15:40 ` Kirill A. Shutemov
2018-01-18 17:22 ` Michal Hocko
2018-01-18 17:22 ` Michal Hocko
2018-01-19 10:02 ` Kirill A. Shutemov
2018-01-19 10:02 ` Kirill A. Shutemov
2018-01-19 10:33 ` Michal Hocko
2018-01-19 10:33 ` Michal Hocko
2018-01-19 11:49 ` Kirill A. Shutemov
2018-01-19 11:49 ` Kirill A. Shutemov
2018-01-19 12:07 ` Michal Hocko
2018-01-19 12:07 ` Michal Hocko
2018-01-19 12:30 ` Kirill A. Shutemov
2018-01-19 12:30 ` Kirill A. Shutemov
2018-01-19 2:01 ` Tetsuo Handa
2018-01-19 2:01 ` Tetsuo Handa
2018-01-11 18:11 ` [mm? 4.15-rc7] " Linus Torvalds
2018-01-11 20:59 ` Tetsuo Handa
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