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From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, corbet@lwn.net,
	hch@lst.de, cl@linux.com, bhe@redhat.com
Subject: [PATCH 1/2] docs: kernel-parameters: Update to reflect the current default size of atomic pool
Date: Fri, 17 Dec 2021 17:08:26 +0800	[thread overview]
Message-ID: <20211217090827.101938-2-bhe@redhat.com> (raw)
In-Reply-To: <20211217090827.101938-1-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 9725c546a0d4..ec4d25e854a8 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -664,7 +664,9 @@
 
 	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:
-- 
2.26.0


  reply	other threads:[~2021-12-17  9:08 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-17  9:08 [PATCH 0/2] Clean up document and small improvement " Baoquan He
2021-12-17  9:08 ` Baoquan He [this message]
2021-12-21  8:50   ` [PATCH 1/2] docs: kernel-parameters: Update to reflect the current default size " Christoph Hellwig
2021-12-17  9:08 ` [PATCH 2/2] dma-pool: allow user to disable " Baoquan He
2021-12-21  8:52   ` Christoph Hellwig
  -- strict thread matches above, loose matches on Subject: below --
2021-06-24  5:20 [PATCH RFC 0/2] " Baoquan He
2021-06-24  5:20 ` [PATCH 1/2] docs: kernel-parameters: Update to reflect the current default size of " Baoquan He

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