From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andres Lagar-Cavilla <andreslc@google.com>,
Yang Shi <yang.shi@linaro.org>, Ning Qu <quning@gmail.com>,
Arnd Bergman <arnd@arndb.de>, Ralf Baechle <ralf@linux-mips.org>,
Vineet Gupta <vgupta@synopsys.com>,
Russell King <linux@arm.linux.org.uk>,
Will Deacon <will.deacon@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
David Miller <davem@davemloft.net>,
Chris Metcalf <cmetcalf@tilera.com>,
Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 10/10] arch: fix has_transparent_hugepage()
Date: Wed, 6 Apr 2016 13:56:59 +0200 [thread overview]
Message-ID: <20160406135659.29846d02@thinkpad> (raw)
In-Reply-To: <alpine.LSU.2.11.1604051355280.5965@eggly.anvils>
On Tue, 5 Apr 2016 14:02:49 -0700 (PDT)
Hugh Dickins <hughd@google.com> wrote:
> I've just discovered that the useful-sounding has_transparent_hugepage()
> is actually an architecture-dependent minefield: on some arches it only
> builds if CONFIG_TRANSPARENT_HUGEPAGE=y, on others it's also there when
> not, but on some of those (arm and arm64) it then gives the wrong answer;
> and on mips alone it's marked __init, which would crash if called later
> (but so far it has not been called later).
>
> Straighten this out: make it available to all configs, with a sensible
> default in asm-generic/pgtable.h, removing its definitions from those
> arches (arc, arm, arm64, sparc, tile) which are served by the default,
> adding #define has_transparent_hugepage has_transparent_hugepage to those
> (mips, powerpc, s390, x86) which need to override the default at runtime,
> and removing the __init from mips (but maybe that kind of code should be
> avoided after init: set a static variable the first time it's called).
>
> Signed-off-by: Hugh Dickins <hughd@google.com>
> ---
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> # for arch/s390 bits
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
prev parent reply other threads:[~2016-04-06 11:57 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 20:37 [PATCH 00/10] mm: easy preliminaries to THPagecache Hugh Dickins
2016-04-05 20:40 ` [PATCH 01/10] mm: update_lru_size warn and reset bad lru_size Hugh Dickins
2016-04-14 11:56 ` Vlastimil Babka
2016-04-05 20:42 ` [PATCH 02/10] mm: update_lru_size do the __mod_zone_page_state Hugh Dickins
2016-04-05 20:44 ` [PATCH 03/10] mm: use __SetPageSwapBacked and dont ClearPageSwapBacked Hugh Dickins
2016-04-06 9:52 ` Mel Gorman
2016-04-05 20:45 ` [PATCH 04/10] tmpfs: preliminary minor tidyups Hugh Dickins
2016-04-05 20:47 ` [PATCH 05/10] tmpfs: mem_cgroup charge fault to vm_mm not current mm Hugh Dickins
2016-04-05 20:49 ` [PATCH 06/10] mm: /proc/sys/vm/stat_refresh to force vmstat update Hugh Dickins
2016-04-05 20:51 ` [PATCH 07/10] huge mm: move_huge_pmd does not need new_vma Hugh Dickins
2016-04-11 10:28 ` Kirill A. Shutemov
2016-04-05 20:52 ` [PATCH 08/10] huge pagecache: extend mremap pmd rmap lockout to files Hugh Dickins
2016-04-11 10:32 ` Kirill A. Shutemov
2016-04-05 20:55 ` [PATCH 09/10] huge pagecache: mmap_sem is unlocked when truncation splits pmd Hugh Dickins
2016-04-11 10:35 ` Kirill A. Shutemov
2016-04-14 17:39 ` Matthew Wilcox
2016-04-16 4:55 ` Andrew Morton
2016-04-05 21:02 ` [PATCH 10/10] arch: fix has_transparent_hugepage() Hugh Dickins
2016-04-05 23:25 ` David Miller
2016-04-06 3:22 ` Vineet Gupta
2016-04-06 6:58 ` Ingo Molnar
2016-04-06 12:29 ` Chris Metcalf
2016-04-06 21:58 ` Ingo Molnar
2016-04-06 11:56 ` Gerald Schaefer [this message]
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=20160406135659.29846d02@thinkpad \
--to=gerald.schaefer@de.ibm.com \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=andreslc@google.com \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=arnd@arndb.de \
--cc=cmetcalf@tilera.com \
--cc=davem@davemloft.net \
--cc=hughd@google.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux@arm.linux.org.uk \
--cc=mingo@kernel.org \
--cc=mpe@ellerman.id.au \
--cc=quning@gmail.com \
--cc=ralf@linux-mips.org \
--cc=schwidefsky@de.ibm.com \
--cc=vgupta@synopsys.com \
--cc=will.deacon@arm.com \
--cc=yang.shi@linaro.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).