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kdump.sysconfig: Remove the option 'log_buf_len' from kdump command line

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The option 'log_buf_len' in the kernel command line will make kernel
dynamically allocate memory (system ram) from memblock and always hold
the memory allocated. If the size of this option is misused such as
'log_buf_len=64M'. This may cause a short of memory for kdump kernel,
because the size of memory is usually limited in kdump kernel.

In order to avoid this problem, need to remove this option from the
kdump kernel command line.

Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Lianbo Jiang 2020-05-22 14:45:41 +08:00 committed by Kairui Song
parent 0094fb496d
commit a81ec90ed8
7 changed files with 7 additions and 7 deletions
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2
kdump.sysconfig
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE

2
kdump.sysconfig.aarch64
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE

2
kdump.sysconfig.i386
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE

2
kdump.sysconfig.ppc64
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE

2
kdump.sysconfig.ppc64le
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE

2
kdump.sysconfig.s390x
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE

2
kdump.sysconfig.x86_64
View File

@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline # This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed # NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len"
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE # after processed by KDUMP_COMMANDLINE_REMOVE