linux-kernel - [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211207030750.30824-2-bhe@redhat.com>
Date:   Tue,  7 Dec 2021 11:07:46 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, akpm@...ux-foundation.org, hch@....de,
        robin.murphy@....com, cl@...ux.com, penberg@...nel.org,
        rientjes@...gle.com, iamjoonsoo.kim@....com, vbabka@...e.cz,
        m.szyprowski@...sung.com, John.p.donnelly@...cle.com,
        kexec@...ts.infradead.org, Baoquan He <bhe@...hat.com>
Subject: [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool

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@...hat.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:
-- 
2.17.2