From: Andrea Arcangeli <aarcange@redhat.com>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
linux-kernel@vger.kernel.org, Michal Hocko <mhocko@kernel.org>,
linux-mm@kvack.org, akpm@linux-foundation.org,
linuxppc-dev@lists.ozlabs.org,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH V6 1/4] mm/cma: Add PF flag to force non cma alloc
Date: Tue, 8 Jan 2019 21:38:12 -0500 [thread overview]
Message-ID: <20190109023812.GF20586@redhat.com> (raw)
In-Reply-To: <20190108045110.28597-2-aneesh.kumar@linux.ibm.com>
On Tue, Jan 08, 2019 at 10:21:07AM +0530, Aneesh Kumar K.V wrote:
> This patch add PF_MEMALLOC_NOCMA which make sure any allocation in that context
> is marked non movable and hence cannot be satisfied by CMA region.
>
> This is useful with get_user_pages_cma_migrate where we take a page pin by
> migrating pages from CMA region. Marking the section PF_MEMALLOC_NOCMA ensures
> that we avoid uncessary page migration later.
>
> Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <aarcange@redhat.com>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: akpm@linux-foundation.org, Michal Hocko <mhocko@kernel.org>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
David Gibson <david@gibson.dropbear.id.au>,
mpe@ellerman.id.au, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH V6 1/4] mm/cma: Add PF flag to force non cma alloc
Date: Tue, 8 Jan 2019 21:38:12 -0500 [thread overview]
Message-ID: <20190109023812.GF20586@redhat.com> (raw)
In-Reply-To: <20190108045110.28597-2-aneesh.kumar@linux.ibm.com>
On Tue, Jan 08, 2019 at 10:21:07AM +0530, Aneesh Kumar K.V wrote:
> This patch add PF_MEMALLOC_NOCMA which make sure any allocation in that context
> is marked non movable and hence cannot be satisfied by CMA region.
>
> This is useful with get_user_pages_cma_migrate where we take a page pin by
> migrating pages from CMA region. Marking the section PF_MEMALLOC_NOCMA ensures
> that we avoid uncessary page migration later.
>
> Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
next prev parent reply other threads:[~2019-01-09 2:39 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 4:51 [PATCH V6 0/4] mm/kvm/vfio/ppc64: Migrate compound pages out of CMA region Aneesh Kumar K.V
2019-01-08 4:51 ` Aneesh Kumar K.V
2019-01-08 4:51 ` [PATCH V6 1/4] mm/cma: Add PF flag to force non cma alloc Aneesh Kumar K.V
2019-01-08 4:51 ` Aneesh Kumar K.V
2019-01-09 2:38 ` Andrea Arcangeli [this message]
2019-01-09 2:38 ` Andrea Arcangeli
2019-01-08 4:51 ` [PATCH V6 2/4] mm: Add get_user_pages_cma_migrate Aneesh Kumar K.V
2019-01-08 4:51 ` Aneesh Kumar K.V
2019-01-08 4:51 ` [PATCH V6 3/4] powerpc/mm/iommu: Allow migration of cma allocated pages during mm_iommu_get Aneesh Kumar K.V
2019-01-08 4:51 ` Aneesh Kumar K.V
2019-01-09 1:53 ` Andrea Arcangeli
2019-01-09 1:53 ` Andrea Arcangeli
2019-01-09 8:40 ` Aneesh Kumar K.V
2019-01-09 8:40 ` Aneesh Kumar K.V
2019-01-08 4:51 ` [PATCH V6 4/4] powerpc/mm/iommu: Allow large IOMMU page size only for hugetlb backing Aneesh Kumar K.V
2019-01-08 4:51 ` Aneesh Kumar K.V
2019-01-08 19:56 ` [PATCH V6 0/4] mm/kvm/vfio/ppc64: Migrate compound pages out of CMA region Andrew Morton
2019-01-08 19:56 ` Andrew Morton
2019-01-09 8:41 ` Aneesh Kumar K.V
2019-01-09 8:41 ` Aneesh Kumar K.V
2019-01-10 4:11 ` David Gibson
2019-01-10 4:11 ` David Gibson
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