From: Martin Schwidefsky <schwidefsky-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
To: Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Michael Kerrisk
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
Rik van Riel <riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
KOSAKI Motohiro
<kosaki.motohiro-+CUm20s59erQFUHtdCDX3A@public.gmane.org>,
Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>,
Jason Evans <je-b10kYP2dOMg@public.gmane.org>,
Zhang Yanfei
<zhangyanfei-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>,
"Kirill A. Shutemov"
<kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>,
Heiko Carstens
<heiko.carstens-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>,
Dominik Dingel
<dingel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
Christian Borntraeger
<borntraeger-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>,
linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Gerald Schaefer
<gerald.schaefer-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH v14 5/8] s390: add pmd_[dirty|mkclean] for THP
Date: Thu, 14 Aug 2014 09:16:14 +0200 [thread overview]
Message-ID: <20140814091614.4a0d5178@mschwide> (raw)
In-Reply-To: <1407981212-17818-6-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
On Thu, 14 Aug 2014 10:53:29 +0900
Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent
> overwrite of the contents since MADV_FREE syscall is called for
> THP page but for s390 pmds only referenced bit is available
> because there is no free bit left in the pmd entry for the
> software dirty bit so this patch adds dumb pmd_dirty which
> returns always true by suggesting by Martin.
>
> They finally find a solution in future.
> http://marc.info/?l=linux-api&m=140440328820808&w=2
The solution is already there, see git commit 152125b7a882df36.
You can drop this patch.
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
WARNING: multiple messages have this Message-ID (diff)
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
Linux API <linux-api@vger.kernel.org>,
Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Jason Evans <je@fb.com>,
Zhang Yanfei <zhangyanfei@cn.fujitsu.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Dominik Dingel <dingel@linux.vnet.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
linux-s390@vger.kernel.org,
Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: Re: [PATCH v14 5/8] s390: add pmd_[dirty|mkclean] for THP
Date: Thu, 14 Aug 2014 09:16:14 +0200 [thread overview]
Message-ID: <20140814091614.4a0d5178@mschwide> (raw)
In-Reply-To: <1407981212-17818-6-git-send-email-minchan@kernel.org>
On Thu, 14 Aug 2014 10:53:29 +0900
Minchan Kim <minchan@kernel.org> wrote:
> MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent
> overwrite of the contents since MADV_FREE syscall is called for
> THP page but for s390 pmds only referenced bit is available
> because there is no free bit left in the pmd entry for the
> software dirty bit so this patch adds dumb pmd_dirty which
> returns always true by suggesting by Martin.
>
> They finally find a solution in future.
> http://marc.info/?l=linux-api&m=140440328820808&w=2
The solution is already there, see git commit 152125b7a882df36.
You can drop this patch.
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
--
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WARNING: multiple messages have this Message-ID (diff)
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
Linux API <linux-api@vger.kernel.org>,
Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Jason Evans <je@fb.com>,
Zhang Yanfei <zhangyanfei@cn.fujitsu.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Dominik Dingel <dingel@linux.vnet.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
linux-s390@vger.kernel.org,
Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: Re: [PATCH v14 5/8] s390: add pmd_[dirty|mkclean] for THP
Date: Thu, 14 Aug 2014 09:16:14 +0200 [thread overview]
Message-ID: <20140814091614.4a0d5178@mschwide> (raw)
In-Reply-To: <1407981212-17818-6-git-send-email-minchan@kernel.org>
On Thu, 14 Aug 2014 10:53:29 +0900
Minchan Kim <minchan@kernel.org> wrote:
> MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent
> overwrite of the contents since MADV_FREE syscall is called for
> THP page but for s390 pmds only referenced bit is available
> because there is no free bit left in the pmd entry for the
> software dirty bit so this patch adds dumb pmd_dirty which
> returns always true by suggesting by Martin.
>
> They finally find a solution in future.
> http://marc.info/?l=linux-api&m=140440328820808&w=2
The solution is already there, see git commit 152125b7a882df36.
You can drop this patch.
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
next prev parent reply other threads:[~2014-08-14 7:16 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-14 1:53 [PATCH v14 0/8] MADV_FREE support Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` [PATCH v14 1/8] mm: support madvise(MADV_FREE) Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` [PATCH v14 2/8] x86: add pmd_[dirty|mkclean] for THP Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` [PATCH v14 3/8] sparc: " Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 2:55 ` David Miller
2014-08-14 2:55 ` David Miller
2014-08-14 2:55 ` David Miller
2014-08-14 1:53 ` [PATCH v14 4/8] powerpc: " Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` [PATCH v14 5/8] s390: " Minchan Kim
2014-08-14 1:53 ` Minchan Kim
[not found] ` <1407981212-17818-6-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2014-08-14 7:16 ` Martin Schwidefsky [this message]
2014-08-14 7:16 ` Martin Schwidefsky
2014-08-14 7:16 ` Martin Schwidefsky
2014-08-18 0:06 ` Minchan Kim
2014-08-18 0:06 ` Minchan Kim
2014-08-18 0:06 ` Minchan Kim
2014-08-14 1:53 ` [PATCH v14 6/8] arm: add pmd_mkclean " Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` Minchan Kim
[not found] ` <1407981212-17818-7-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2014-08-15 10:55 ` Will Deacon
2014-08-15 10:55 ` Will Deacon
2014-08-15 10:55 ` Will Deacon
2014-08-15 10:55 ` Will Deacon
2014-08-14 1:53 ` [PATCH v14 7/8] arm64: add pmd_[dirty|mkclean] " Minchan Kim
2014-08-14 1:53 ` Minchan Kim
2014-08-14 1:53 ` Minchan Kim
[not found] ` <1407981212-17818-8-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2014-08-15 10:55 ` Will Deacon
2014-08-15 10:55 ` Will Deacon
2014-08-15 10:55 ` Will Deacon
2014-08-15 10:55 ` Will Deacon
2014-08-14 1:53 ` [PATCH v14 8/8] mm: Don't split THP page when syscall is called Minchan Kim
2014-08-14 1:53 ` Minchan Kim
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