From: Matthew Wilcox <willy@infradead.org>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: "arnd@kernel.org" <arnd@kernel.org>,
"grygorii.strashko@ti.com" <grygorii.strashko@ti.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"ilias.apalodimas@linaro.org" <ilias.apalodimas@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mips@vger.kernel.org" <linux-mips@vger.kernel.org>,
"mhocko@kernel.org" <mhocko@kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"mgorman@suse.de" <mgorman@suse.de>,
"brouer@redhat.com" <brouer@redhat.com>,
"mcroce@linux.microsoft.com" <mcroce@linux.microsoft.com>,
"linux-snps-arc@lists.infradead.org"
<linux-snps-arc@lists.infradead.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"hch@lst.de" <hch@lst.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/2] mm: Fix struct page layout on 32-bit systems
Date: Tue, 20 Apr 2021 04:10:29 +0100 [thread overview]
Message-ID: <20210420031029.GI2531743@casper.infradead.org> (raw)
In-Reply-To: <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com>
On Tue, Apr 20, 2021 at 02:48:17AM +0000, Vineet Gupta wrote:
> > 32-bit architectures which expect 8-byte alignment for 8-byte integers
> > and need 64-bit DMA addresses (arc, arm, mips, ppc) had their struct
> > page inadvertently expanded in 2019.
>
> FWIW, ARC doesn't require 8 byte alignment for 8 byte integers. This is
> only needed for 8-byte atomics due to the requirements of LLOCKD/SCOND
> instructions.
Ah, like x86? OK, great, I'll drop your arch from the list of
affected. Thanks!
next prev parent reply other threads:[~2021-04-20 3:11 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 23:07 [PATCH 0/2] Change struct page layout for page_pool Matthew Wilcox (Oracle)
2021-04-16 23:07 ` [PATCH 1/2] mm: Fix struct page layout on 32-bit systems Matthew Wilcox (Oracle)
2021-04-17 1:08 ` kernel test robot
2021-04-17 2:45 ` Matthew Wilcox
2021-04-17 18:32 ` Ilias Apalodimas
2021-04-17 20:22 ` Matthew Wilcox
2021-04-18 11:21 ` Ilias Apalodimas
2021-04-17 21:18 ` David Laight
2021-04-17 22:45 ` Matthew Wilcox
2021-04-20 2:48 ` Vineet Gupta
2021-04-20 3:10 ` Matthew Wilcox [this message]
2021-04-20 7:07 ` Arnd Bergmann
2021-04-20 21:14 ` Vineet Gupta
2021-04-20 21:20 ` Arnd Bergmann
2021-04-21 5:50 ` hch
2021-04-21 8:43 ` David Laight
2021-04-21 8:58 ` Arnd Bergmann
2021-04-20 7:39 ` Geert Uytterhoeven
2021-04-20 8:39 ` David Laight
2021-04-20 11:32 ` Matthew Wilcox
2021-04-17 7:34 ` Jesper Dangaard Brouer
2021-04-20 7:21 ` Rasmus Villemoes
2021-04-16 23:07 ` [PATCH 2/2] mm: Indicate pfmemalloc pages in compound_head Matthew Wilcox (Oracle)
2021-04-17 21:13 ` David Laight
2021-04-17 21:28 ` Matthew Wilcox
2021-04-20 4:03 ` [PATCH 0/2] Change struct page layout for page_pool Michael Ellerman
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