From: Minchan Kim <minchan@kernel.org>
To: John Stultz <john.stultz@linaro.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Android Kernel Team <kernel-team@android.com>,
Robert Love <rlove@google.com>, Mel Gorman <mel@csn.ul.ie>,
Hugh Dickins <hughd@google.com>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Rik van Riel <riel@redhat.com>,
Dmitry Adamushko <dmitry.adamushko@gmail.com>,
Dave Chinner <david@fromorbit.com>, Neil Brown <neilb@suse.de>,
Andrea Righi <andrea@betterlinux.com>,
Andrea Arcangeli <aarcange@redhat.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Mike Hommey <mh@glandium.org>, Taras Glek <tglek@mozilla.com>,
Dhaval Giani <dgiani@mozilla.com>, Jan Kara <jack@suse.cz>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Michel Lespinasse <walken@google.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH 8/8] vrange: Send SIGBUS when user try to access purged page
Date: Wed, 19 Jun 2013 13:36:50 +0900 [thread overview]
Message-ID: <20130619043650.GB10961@bbox> (raw)
In-Reply-To: <1371010971-15647-9-git-send-email-john.stultz@linaro.org>
On Tue, Jun 11, 2013 at 09:22:51PM -0700, John Stultz wrote:
> From: Minchan Kim <minchan@kernel.org>
>
> By vrange(2) semantic, user should see SIGBUG if he try to access
> purged page without vrange(...VRANGE_NOVOLATILE).
>
> This patch implements it.
>
> XXX: I reused PSE bit for quick prototype without enough considering
> so need time to see what's empty bit and I am surely missing
> many places to handle vrange pte bit. I should investigate all of
> pte handling places, especially pte_none case.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Android Kernel Team <kernel-team@android.com>
> Cc: Robert Love <rlove@google.com>
> Cc: Mel Gorman <mel@csn.ul.ie>
> Cc: Hugh Dickins <hughd@google.com>
> Cc: Dave Hansen <dave@linux.vnet.ibm.com>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: Dmitry Adamushko <dmitry.adamushko@gmail.com>
> Cc: Dave Chinner <david@fromorbit.com>
> Cc: Neil Brown <neilb@suse.de>
> Cc: Andrea Righi <andrea@betterlinux.com>
> Cc: Andrea Arcangeli <aarcange@redhat.com>
> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> Cc: Mike Hommey <mh@glandium.org>
> Cc: Taras Glek <tglek@mozilla.com>
> Cc: Dhaval Giani <dgiani@mozilla.com>
> Cc: Jan Kara <jack@suse.cz>
> Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
> Cc: Michel Lespinasse <walken@google.com>
> Cc: Minchan Kim <minchan@kernel.org>
> Cc: linux-mm@kvack.org <linux-mm@kvack.org>
>
> Signed-off-by: Minchan Kim <minchan@kernel.org>
> [jstultz: Extended to work with file pages]
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
> arch/x86/include/asm/pgtable_types.h | 2 ++
> include/asm-generic/pgtable.h | 11 +++++++++++
> include/linux/vrange.h | 2 ++
> mm/memory.c | 23 +++++++++++++++++++++--
> mm/vrange.c | 35 ++++++++++++++++++++++++++++++++++-
> 5 files changed, 70 insertions(+), 3 deletions(-)
>
This patch fixes the problem Dhaval reported.
next prev parent reply other threads:[~2013-06-19 4:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-12 4:22 [PATCH 0/8] Volatile Ranges (v8?) John Stultz
2013-06-12 4:22 ` [PATCH 1/8] vrange: Add basic data structure and functions John Stultz
2013-06-12 4:22 ` [PATCH 2/8] vrange: Add vrange support for file address_spaces John Stultz
2013-06-12 4:22 ` [PATCH 3/8] vrange: Add vrange support to mm_structs John Stultz
2013-06-12 4:22 ` [PATCH 4/8] vrange: Clear volatility on new mmaps John Stultz
2013-06-13 6:28 ` Minchan Kim
2013-06-13 23:43 ` John Stultz
2013-06-14 0:21 ` Minchan Kim
2013-06-12 4:22 ` [PATCH 5/8] vrange: Add new vrange(2) system call John Stultz
2013-06-12 6:48 ` NeilBrown
2013-06-12 18:47 ` John Stultz
2013-06-20 21:05 ` Dhaval Giani
2013-06-12 4:22 ` [PATCH 6/8] vrange: Add GFP_NO_VRANGE allocation flag John Stultz
2013-06-12 4:22 ` [PATCH 7/8] vrange: Add method to purge volatile ranges John Stultz
2013-06-17 7:13 ` Minchan Kim
2013-06-17 7:24 ` Minchan Kim
2013-06-19 4:34 ` Minchan Kim
2013-10-01 14:00 ` Krzysztof Kozlowski
2013-10-02 1:32 ` Minchan Kim
2013-06-12 4:22 ` [PATCH 8/8] vrange: Send SIGBUS when user try to access purged page John Stultz
2013-06-19 4:36 ` Minchan Kim [this message]
2013-06-17 16:24 ` [PATCH 0/8] Volatile Ranges (v8?) Dhaval Giani
2013-06-18 4:11 ` Minchan Kim
2013-06-18 16:59 ` Dhaval Giani
2013-06-19 4:41 ` Minchan Kim
2013-06-19 18:36 ` Dhaval Giani
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