Messages in this thread | | | Date | Wed, 10 Jun 2015 12:09:59 +0900 | From | Kamezawa Hiroyuki <> | Subject | Re: [RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory |
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On 2015/06/09 19:09, Xishi Qiu wrote: > On 2015/6/9 15:06, Kamezawa Hiroyuki wrote: > >> On 2015/06/04 22:02, Xishi Qiu wrote: >>> Add a new interface in path /proc/sys/vm/mirrorable. When set to 1, it means >>> we should allocate mirrored memory for both user and kernel processes. >>> >>> Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> >> >> I can't see why do we need this switch. If this is set, all GFP_HIGHUSER will use >> mirrored memory ? >> >> Or will you add special MMAP/madvise flag to use mirrored memory ? >> > > Hi Kame, > > Yes, > > MMAP/madvise > -> add VM_MIRROR > -> add GFP_MIRROR > -> use MIGRATE_MIRROR list to alloc mirrored pages > > So user can use mirrored memory. What do you think? >
I see. please explain it (your final plan) in patch description or in cover page of patches.
Thanks, -Kame
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