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Date: Thu, 20 Oct 2016 21:26:47 +0200 From: Michal Hocko <mhocko@...nel.org> To: Dave Hansen <dave.hansen@...ux.intel.com> Cc: Lorenzo Stoakes <lstoakes@...il.com>, linux-mm@...ck.org, Linus Torvalds <torvalds@...ux-foundation.org>, Jan Kara <jack@...e.cz>, Hugh Dickins <hughd@...gle.com>, Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...hsingularity.net>, Andrew Morton <akpm@...ux-foundation.org>, adi-buildroot-devel@...ts.sourceforge.net, ceph-devel@...r.kernel.org, dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org, kvm@...r.kernel.org, linux-alpha@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-cris-kernel@...s.com, linux-fbdev@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, linux-mips@...ux-mips.org, linux-rdma@...r.kernel.org, linux-s390@...r.kernel.org, linux-samsung-soc@...r.kernel.org, linux-scsi@...r.kernel.org, linux-security-module@...r.kernel.org, linux-sh@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org, sparclinux@...r.kernel.org, x86@...nel.org Subject: Re: [PATCH 00/10] mm: adjust get_user_pages* functions to explicitly pass FOLL_* flags On Wed 19-10-16 10:23:55, Dave Hansen wrote: > On 10/19/2016 10:01 AM, Michal Hocko wrote: > > The question I had earlier was whether this has to be an explicit FOLL > > flag used by g-u-p users or we can just use it internally when mm != > > current->mm > > The reason I chose not to do that was that deferred work gets run under > a basically random 'current'. If we just use 'mm != current->mm', then > the deferred work will sometimes have pkeys enforced and sometimes not, > basically randomly. OK, I see (async_pf_execute and ksm ). It makes more sense to me. Thanks for the clarification. -- Michal Hocko SUSE Labs
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