From: Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Mike Rapoprt <rppt-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
Cc: Andrea Arcangeli
<aarcange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Vlastimil Babka <vbabka-AlSwsSmVLrQ@public.gmane.org>,
"Kirill A. Shutemov"
<kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
"Kirill A. Shutemov"
<kirill.shutemov-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Pavel Emelyanov <xemul-5HdwGun5lf+gSpxsJD1C4w@public.gmane.org>,
linux-mm <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
lkml <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH] mm: introduce MADV_CLR_HUGEPAGE
Date: Wed, 31 May 2017 16:19:40 +0200 [thread overview]
Message-ID: <20170531141939.GP27783@dhcp22.suse.cz> (raw)
In-Reply-To: <8FA5E4C2-D289-4AF5-AA09-6C199E58F9A5-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
On Wed 31-05-17 15:39:22, Mike Rapoprt wrote:
>
>
> On May 31, 2017 3:08:22 PM GMT+03:00, Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
[...]
> > From what Mike said a global disable THP for the whole process
> >while the post-copy is in progress is a better solution anyway.
>
> For the CRIU usecase, disabling THP for a while and re-enabling
> it back will do the trick, provided VMAs flags are not affected,
> like in the patch you've sent. Moreover, we may even get away with
> ioctl(UFFDIO_COPY) if it's overhead shows to be negligible. Still,
> I believe that MADV_RESET_HUGEPAGE (or some better named) command has
> the value on its own.
I would prefer if we could go the prctl if possible and add a new
MADV_RESET_HUGEPAGE if there is really a usecase for it.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2017-05-31 14:19 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1495433562-26625-1-git-send-email-rppt@linux.vnet.ibm.com>
[not found] ` <20170522114243.2wrdbncilozygbpl@node.shutemov.name>
[not found] ` <20170522133559.GE27382@rapoport-lnx>
[not found] ` <20170522135548.GA8514@dhcp22.suse.cz>
[not found] ` <20170522142927.GG27382@rapoport-lnx>
[not found] ` <a9e74c22-1a07-f49a-42b5-497fee85e9c9@suse.cz>
[not found] ` <20170524075043.GB3063@rapoport-lnx>
2017-05-24 7:58 ` [PATCH] mm: introduce MADV_CLR_HUGEPAGE Vlastimil Babka
2017-05-24 10:39 ` Mike Rapoport
2017-05-24 11:18 ` Michal Hocko
2017-05-24 14:25 ` Pavel Emelyanov
2017-05-24 14:27 ` Mike Rapoport
2017-05-24 15:22 ` Andrea Arcangeli
2017-05-30 7:44 ` Michal Hocko
[not found] ` <20170530074408.GA7969-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-05-30 10:19 ` Mike Rapoport
2017-05-30 10:39 ` Michal Hocko
[not found] ` <20170530103930.GB7969-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-05-30 14:04 ` Andrea Arcangeli
2017-05-30 14:39 ` Michal Hocko
[not found] ` <20170530143941.GK7969-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-05-30 14:56 ` Michal Hocko
[not found] ` <20170530145632.GL7969-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-05-30 16:06 ` Andrea Arcangeli
2017-05-31 6:30 ` Vlastimil Babka
2017-05-31 8:24 ` Michal Hocko
2017-05-31 9:27 ` Mike Rapoport
2017-05-31 10:24 ` Michal Hocko
[not found] ` <20170531082414.GB27783-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-05-31 10:22 ` Michal Hocko
2017-06-01 11:00 ` Mike Rapoport
2017-06-01 12:27 ` Michal Hocko
2017-05-30 15:43 ` Andrea Arcangeli
2017-05-31 12:08 ` Michal Hocko
[not found] ` <20170531120822.GL27783-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-05-31 12:39 ` Mike Rapoprt
2017-05-31 14:18 ` Andrea Arcangeli
[not found] ` <20170531141809.GB302-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-05-31 14:32 ` Michal Hocko
2017-05-31 15:46 ` Andrea Arcangeli
2017-06-01 6:58 ` Mike Rapoport
[not found] ` <8FA5E4C2-D289-4AF5-AA09-6C199E58F9A5-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-05-31 14:19 ` Michal Hocko [this message]
2017-06-01 6:53 ` Mike Rapoport
2017-06-01 8:09 ` Michal Hocko
[not found] ` <20170601080909.GD32677-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-06-01 8:35 ` Mike Rapoport
2017-06-01 13:45 ` Andrea Arcangeli
2017-06-02 9:11 ` Mike Rapoport
2017-05-31 9:08 ` Mike Rapoport
2017-05-31 12:05 ` Michal Hocko
2017-05-31 12:25 ` Mike Rapoprt
2017-05-24 11:31 ` Vlastimil Babka
2017-05-24 14:28 ` Pavel Emelyanov
2017-05-24 14:54 ` Vlastimil Babka
2017-05-24 15:13 ` Mike Rapoport
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