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Commit c6045031 authored by Baoquan He's avatar Baoquan He Committed by Jonathan Corbet
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Documentation: Update the default value of crashkernel low 



In commit 94fb9334 ("x86/crash: Allocate enough low memory when
crashkernel=high") the default value of crashkernel low memory
is changed to 256M. In this patch update it accordingly.

Signed-off-by: default avatarBaoquan He <bhe@redhat.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 3657c20d

Documentation/kernel-parameters.txt

+4 −2
Original line number Diff line number Diff line
@@ -789,8 +789,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 
			is passed, kernel could allocate physical memory region

			above 4G, that cause second kernel crash on system

			that require some amount of low memory, e.g. swiotlb

			requires at least 64M+32K low memory.  Kernel would

			try to allocate 72M below 4G automatically.

			requires at least 64M+32K low memory, also enough extra

			low memory is needed to make sure DMA buffers for 32-bit

			devices won't run out. Kernel would try to allocate at

			at least 256M below 4G automatically.

			This one let user to specify own low range under 4G

			for second kernel instead.

			0: to disable low allocation.