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Message-Id: <cover.1601336054.git.cgoldswo@codeaurora.org>
Date: Mon, 28 Sep 2020 16:36:21 -0700
From: Chris Goldsworthy <cgoldswo@...eaurora.org>
To: akpm@...ux-foundation.org, linux-mm@...ck.org, minchan@...nel.org,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
pratikp@...eaurora.org, pdaly@...eaurora.org,
sudaraja@...eaurora.org, iamjoonsoo.kim@....com, david@...hat.com,
vinmenon@...eaurora.org, minchan.kim@...il.com
Cc: Chris Goldsworthy <cgoldswo@...eaurora.org>
Subject: [PATCH v5] mm: cma: indefinitely retry allocations in cma_alloc
V1: Introduces a retry loop that attempts a CMA allocation a finite
number of times before giving up:
https://lkml.org/lkml/2020/8/5/1097
https://lkml.org/lkml/2020/8/11/893
V2: Introduces an indefinite retry for CMA allocations. David Hildenbrand
raised a page pinning example which precludes doing this infite-retrying
for all CMA users:
https://lkml.org/lkml/2020/9/17/984
V3: Re-introduce a GFP mask argument for cma_alloc(), that can take in
__GFP_NOFAIL as an argument to indicate that a CMA allocation should be
retried indefinitely. This lets callers of cma_alloc() decide if they want
to perform indefinite retires. Also introduces a config option for
controlling the duration of the sleep between retries:
https://www.spinics.net/lists/linux-mm/msg228778.html
V4: In response to comments by Minchan Kim, we make the sleep interruptable
and remove a defconfig option controlling how long the sleep lasts for (it
is now a fixed 100 ms):
https://lkml.org/lkml/2020/9/28/1144
V5: Add missing fatal_signal_pending() check
Chris Goldsworthy (1):
mm: cma: indefinitely retry allocations in cma_alloc
arch/powerpc/kvm/book3s_hv_builtin.c | 2 +-
drivers/dma-buf/heaps/cma_heap.c | 2 +-
drivers/s390/char/vmcp.c | 2 +-
drivers/staging/android/ion/ion_cma_heap.c | 2 +-
include/linux/cma.h | 2 +-
kernel/dma/contiguous.c | 4 +--
mm/cma.c | 39 +++++++++++++++++++++++++-----
mm/cma_debug.c | 2 +-
mm/hugetlb.c | 4 +--
9 files changed, 43 insertions(+), 16 deletions(-)
--
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