Re: [PATCH 3/3] powerpc/mm: Add page soft dirty tracking

2015-10-17 Thread Benjamin Herrenschmidt
On Sat, 2015-10-17 at 17:49 +0530, Aneesh Kumar K.V wrote: > This will break after > https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-October/135298.html > > > A good option is to drop this patch from the series and let Andrew take > the first two patches. You can send an updated version of p

Re: [PATCH 3/3] powerpc/mm: Add page soft dirty tracking

2015-10-17 Thread Aneesh Kumar K.V
Laurent Dufour writes: > User space checkpoint and restart tool (CRIU) needs the page's change > to be soft tracked. This allows to do a pre checkpoint and then dump > only touched pages. > > This is done by using a newly assigned PTE bit (_PAGE_SOFT_DIRTY) when > the page is backed in memory, an

[PATCH 3/3] powerpc/mm: Add page soft dirty tracking

2015-10-16 Thread Laurent Dufour
User space checkpoint and restart tool (CRIU) needs the page's change to be soft tracked. This allows to do a pre checkpoint and then dump only touched pages. This is done by using a newly assigned PTE bit (_PAGE_SOFT_DIRTY) when the page is backed in memory, and a new _PAGE_SWP_SOFT_DIRTY bit whe