From: Nicolin Chen <nicoleotsuka@gmail.com>
To: hch@lst.de, robin.murphy@arm.com
Cc: vdumpa@nvidia.com, linux@armlinux.org.uk,
catalin.marinas@arm.com, will.deacon@arm.com, joro@8bytes.org,
m.szyprowski@samsung.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
tony@atomide.com
Subject: [PATCH v2 RFC/RFT 0/5] Save single pages from CMA area
Date: Tue, 26 Mar 2019 16:01:26 -0700 [thread overview]
Message-ID: <20190326230131.16275-1-nicoleotsuka@gmail.com> (raw)
This series of patches try to save single pages from CMA area bypassing
all CMA single page alloctions and allocating normal pages instead, as
all addresses within one single page are contiguous.
We had once applied the PATCH-5 but reverted it as actually not all the
callers handled the fallback allocations. Per Robin's suggestion, let's
stuff alloc_pages()/free_page() fallbacks to those callers before having
PATCH-5.
Changlog
v1->v2:
* PATCH-2: Initialized page pointer to NULL
Nicolin Chen (5):
ARM: dma-mapping: Add fallback normal page allocations
dma-remap: Run alloc_pages() on failure
iommu: amd_iommu: Add fallback normal page allocations
arm64: dma-mapping: Add fallback normal page allocations
dma-contiguous: Do not allocate a single page from CMA area
arch/arm/mm/dma-mapping.c | 13 ++++++++++---
arch/arm64/mm/dma-mapping.c | 19 ++++++++++++-------
drivers/iommu/amd_iommu.c | 3 +++
kernel/dma/contiguous.c | 22 +++++++++++++++++++---
kernel/dma/remap.c | 4 ++--
5 files changed, 46 insertions(+), 15 deletions(-)
--
2.17.1
next reply other threads:[~2019-03-26 23:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-26 23:01 Nicolin Chen [this message]
2019-03-26 23:01 ` [PATCH v2 RFC/RFT 1/5] ARM: dma-mapping: Add fallback normal page allocations Nicolin Chen
2019-04-24 15:06 ` Christoph Hellwig
2019-04-24 15:08 ` Christoph Hellwig
2019-04-24 18:33 ` Nicolin Chen
2019-04-24 19:26 ` Christoph Hellwig
2019-04-24 19:38 ` Nicolin Chen
2019-04-30 15:24 ` Catalin Marinas
2019-05-02 13:26 ` Christoph Hellwig
2019-04-26 20:21 ` Nicolin Chen
2019-04-26 20:25 ` Christoph Hellwig
2019-03-26 23:01 ` [PATCH v2 RFC/RFT 2/5] dma-remap: Run alloc_pages() on failure Nicolin Chen
2019-03-26 23:01 ` [PATCH v2 RFC/RFT 3/5] iommu: amd_iommu: Add fallback normal page allocations Nicolin Chen
2019-03-26 23:01 ` [PATCH v2 RFC/RFT 4/5] arm64: dma-mapping: " Nicolin Chen
2019-03-26 23:01 ` [PATCH v2 RFC/RFT 5/5] dma-contiguous: Do not allocate a single page from CMA area Nicolin Chen
2019-03-27 8:08 ` [PATCH v2 RFC/RFT 0/5] Save single pages " Christoph Hellwig
2019-03-27 18:42 ` Nicolin Chen
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