From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@lst.de,
robin.murphy@arm.com, cl@linux.com, penberg@kernel.org,
rientjes@google.com, iamjoonsoo.kim@lge.com, vbabka@suse.cz,
m.szyprowski@samsung.com, rppt@linux.ibm.com,
Baoquan He <bhe@redhat.com>
Subject: [RFC PATCH v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool
Date: Tue, 10 Aug 2021 17:48:31 +0800 [thread overview]
Message-ID: <20210810094835.13402-2-bhe@redhat.com> (raw)
In-Reply-To: <20210810094835.13402-1-bhe@redhat.com>
Since commit 1d659236fb43("dma-pool: scale the default DMA coherent pool
size with memory capacity"), the default size of atomic pool has been
changed to take by scaling with system memory capacity. So update the
document in kerenl-parameter.txt accordingly.
Signed-off-by: Baoquan He <bhe@redhat.com>
---
Documentation/admin-guide/kernel-parameters.txt | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index bdb22006f713..970ed65db89f 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -653,7 +653,9 @@
coherent_pool=nn[KMG] [ARM,KNL]
Sets the size of memory pool for coherent, atomic dma
- allocations, by default set to 256K.
+ allocations. Otherwise the default size will be scaled
+ with memory capacity, while clamped between 128K and
+ 1 << (PAGE_SHIFT + MAX_ORDER-1).
com20020= [HW,NET] ARCnet - COM20020 chipset
Format:
--
2.17.2
next prev parent reply other threads:[~2021-08-10 9:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-10 9:48 [RFC PATCH v2 0/5] Avoid requesting page from DMA zone when no managed pages Baoquan He
2021-08-10 9:48 ` Baoquan He [this message]
2021-08-10 9:48 ` [RFC PATCH v2 2/5] dma-pool: allow user to disable atomic pool Baoquan He
2021-08-10 9:48 ` [RFC PATCH v2 3/5] mm_zone: add function to check if managed dma zone exists Baoquan He
2021-08-10 9:48 ` [RFC PATCH v2 4/5] dma/pool: create dma atomic pool only if dma zone has mamaged pages Baoquan He
2021-08-10 9:48 ` [RFC PATCH v2 5/5] mm/slub: do not create dma-kmalloc if no managed pages in DMA zone Baoquan He
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