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From: Pingfan Liu <kernelfans@gmail.com>
To: kexec@lists.infradead.org, linux-doc@vger.kernel.org
Cc: Pingfan Liu <piliu@redhat.com>, Baoquan He <bhe@redhat.com>,
	Dave Young <dyoung@redhat.com>
Subject: [PATCH] Documentation: kdump: Clarify the default size of memory reserved by crashkernel low
Date: Mon, 18 Dec 2023 11:40:20 +0800	[thread overview]
Message-ID: <20231218034020.15341-1-kernelfans@gmail.com> (raw)

From: Pingfan Liu <piliu@redhat.com>

The default size reserved for crashkernel=,low is decided by the macro
DEFAULT_CRASH_KERNEL_LOW_SIZE, which is based on arch.

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
To: kexec@lists.infradead.org
To: linux-doc@vger.kernel.org
---
 Documentation/admin-guide/kdump/kdump.rst | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/kdump/kdump.rst b/Documentation/admin-guide/kdump/kdump.rst
index 5762e7477a0c..a021ff155012 100644
--- a/Documentation/admin-guide/kdump/kdump.rst
+++ b/Documentation/admin-guide/kdump/kdump.rst
@@ -310,8 +310,9 @@ crashkernel syntax
    region above 4G, low memory under 4G is needed in this case. There are
    three ways to get low memory:
 
-      1) Kernel will allocate at least 256M memory below 4G automatically
-         if crashkernel=Y,low is not specified.
+      1) Kernel will allocate a chunk of default size memory, which is based on
+         architecture, below 4G automatically if crashkernel=Y,low is not
+         specified.
       2) Let user specify low memory size instead.
       3) Specified value 0 will disable low memory allocation::
 
-- 
2.31.1


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WARNING: multiple messages have this Message-ID (diff)
From: Pingfan Liu <kernelfans@gmail.com>
To: kexec@lists.infradead.org, linux-doc@vger.kernel.org
Cc: Pingfan Liu <piliu@redhat.com>, Baoquan He <bhe@redhat.com>,
	Dave Young <dyoung@redhat.com>
Subject: [PATCH] Documentation: kdump: Clarify the default size of memory reserved by crashkernel low
Date: Mon, 18 Dec 2023 11:40:20 +0800	[thread overview]
Message-ID: <20231218034020.15341-1-kernelfans@gmail.com> (raw)

From: Pingfan Liu <piliu@redhat.com>

The default size reserved for crashkernel=,low is decided by the macro
DEFAULT_CRASH_KERNEL_LOW_SIZE, which is based on arch.

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
To: kexec@lists.infradead.org
To: linux-doc@vger.kernel.org
---
 Documentation/admin-guide/kdump/kdump.rst | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/kdump/kdump.rst b/Documentation/admin-guide/kdump/kdump.rst
index 5762e7477a0c..a021ff155012 100644
--- a/Documentation/admin-guide/kdump/kdump.rst
+++ b/Documentation/admin-guide/kdump/kdump.rst
@@ -310,8 +310,9 @@ crashkernel syntax
    region above 4G, low memory under 4G is needed in this case. There are
    three ways to get low memory:
 
-      1) Kernel will allocate at least 256M memory below 4G automatically
-         if crashkernel=Y,low is not specified.
+      1) Kernel will allocate a chunk of default size memory, which is based on
+         architecture, below 4G automatically if crashkernel=Y,low is not
+         specified.
       2) Let user specify low memory size instead.
       3) Specified value 0 will disable low memory allocation::
 
-- 
2.31.1


             reply	other threads:[~2023-12-18  3:40 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-18  3:40 Pingfan Liu [this message]
2023-12-18  3:40 ` [PATCH] Documentation: kdump: Clarify the default size of memory reserved by crashkernel low Pingfan Liu
2023-12-19  7:28 ` Baoquan He
2023-12-19  7:28   ` Baoquan He
2024-01-16  8:47 ` Baoquan He
2024-01-16  8:47   ` Baoquan He

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