From: Lorenzo Stoakes <lstoakes@gmail.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: linux-mm@kvack.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Jan Kara <jack@suse.cz>, Hugh Dickins <hughd@google.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Rik van Riel <riel@redhat.com>,
Mel Gorman <mgorman@techsingularity.net>,
Andrew Morton <akpm@linux-foundation.org>,
adi-buildroot-devel@lists.sourceforge.net,
ceph-devel@vger.kernel.org, dri-devel@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org, kvm@vger.kernel.org,
linux-alpha@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-cris-kernel@axis.com,
linux-fbdev@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, linux-mips@linux-mips.org,
linux-rdma@vger.kernel.org, linux-s390@vger.kernel.org,
linux-samsung-soc@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-security-module@vger.kernel.org, linux-sh@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org,
sparclinux@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH 00/10] mm: adjust get_user_pages* functions to explicitly pass FOLL_* flags
Date: Wed, 19 Oct 2016 09:58:15 +0100 [thread overview]
Message-ID: <20161019085815.GA22239@lucifer> (raw)
In-Reply-To: <20161018153050.GC13117@dhcp22.suse.cz>
On Tue, Oct 18, 2016 at 05:30:50PM +0200, Michal Hocko wrote:
> I am wondering whether we can go further. E.g. it is not really clear to
> me whether we need an explicit FOLL_REMOTE when we can in fact check
> mm != current->mm and imply that. Maybe there are some contexts which
> wouldn't work, I haven't checked.
This flag is set even when /proc/self/mem is used. I've not looked deeply into
this flag but perhaps accessing your own memory this way can be considered
'remote' since you're not accessing it directly. On the other hand, perhaps this
is just mistaken in this case?
> I guess there is more work in that area and I do not want to impose all
> that work on you, but I couldn't resist once I saw you playing in that
> area ;) Definitely a good start!
Thanks, I am more than happy to go as far down this rabbit hole as is helpful,
no imposition at all :)
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next prev parent reply other threads:[~2016-10-19 8:58 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 0:20 [PATCH 00/10] mm: adjust get_user_pages* functions to explicitly pass FOLL_* flags Lorenzo Stoakes
2016-10-13 0:20 ` [PATCH 01/10] mm: remove write/force parameters from __get_user_pages_locked() Lorenzo Stoakes
2016-10-18 12:43 ` Jan Kara
2016-10-13 0:20 ` [PATCH 02/10] mm: remove write/force parameters from __get_user_pages_unlocked() Lorenzo Stoakes
2016-10-13 6:54 ` Paolo Bonzini
2016-10-18 12:46 ` Jan Kara
2016-10-13 0:20 ` [PATCH 03/10] mm: replace get_user_pages_unlocked() write/force parameters with gup_flags Lorenzo Stoakes
2016-10-18 12:50 ` Jan Kara
2016-10-13 0:20 ` [PATCH 04/10] mm: replace get_user_pages_locked() " Lorenzo Stoakes
2016-10-18 12:54 ` Jan Kara
2016-10-18 13:56 ` Lorenzo Stoakes
2016-10-19 7:32 ` Jan Kara
2016-10-19 7:33 ` Jan Kara
2016-10-13 0:20 ` [PATCH 05/10] mm: replace get_vaddr_frames() " Lorenzo Stoakes
2016-10-19 7:34 ` Jan Kara
2016-10-13 0:20 ` [PATCH 06/10] mm: replace get_user_pages() " Lorenzo Stoakes
2016-10-17 9:22 ` Jesper Nilsson
2016-10-19 7:44 ` Jan Kara
2016-10-13 0:20 ` [PATCH 07/10] mm: replace get_user_pages_remote() " Lorenzo Stoakes
2016-10-19 7:47 ` Jan Kara
2016-10-13 0:20 ` [PATCH 08/10] mm: replace __access_remote_vm() write parameter " Lorenzo Stoakes
2016-10-19 7:59 ` Jan Kara
2016-10-19 8:13 ` Michal Hocko
2016-10-19 8:40 ` Lorenzo Stoakes
2016-10-19 8:52 ` Michal Hocko
2016-10-19 9:06 ` Lorenzo Stoakes
2016-10-19 9:23 ` Michal Hocko
2016-10-13 0:20 ` [PATCH 09/10] mm: replace access_remote_vm() " Lorenzo Stoakes
2016-10-13 0:20 ` [PATCH 10/10] mm: replace access_process_vm() " Lorenzo Stoakes
2016-10-17 9:23 ` Jesper Nilsson
2016-10-19 11:10 ` Michael Ellerman
2016-10-13 7:32 ` [PATCH 00/10] mm: adjust get_user_pages* functions to explicitly pass FOLL_* flags Christian König
2016-10-18 15:30 ` Michal Hocko
2016-10-19 8:58 ` Lorenzo Stoakes [this message]
2016-10-19 9:07 ` Michal Hocko
2016-10-19 16:49 ` Dave Hansen
2016-10-19 17:01 ` Michal Hocko
2016-10-19 17:23 ` Dave Hansen
2016-10-20 19:26 ` Michal Hocko
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