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Don't inherit swiotlb parameter form 1st kernel by default

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Usually kdump kernel don't need a swiotlb. There are two cases known
common case a swiotlb is needed:

 - SEV/SME is active.
 - crashkernel high reservation is used, or there are crashkernel memory
   above 4G.

For both case, if swiotlb is set to a large value in first kernel, kdump
kernel will likely to fail with OOM. So don't inherit swiotlb parameter
by default.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Kairui Song 2020-05-17 16:14:06 +08:00
parent 0cc3b85d0d
commit 134c578463
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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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 log_buf_len" KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
# 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