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s390/kdump: Account /sys/kernel/kexec_crash_size changes in OS info

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The crashkernel size for kdump can be reduced at runtime with the
sysfs file "/sys/kernel/kexec_crash_size". Currently those changes
do not update the OS info crashkernel information that is used
for stand-alone kdump. With this fix now also the OS info crashkernel
information is updated correctly.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2012-05-18 15:10:05 +02:00 • committed by Martin Schwidefsky
parent d7b7cdea06
commit a9fbf1a538
1 changed files with 7 additions and 1 deletions
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8
arch/s390/kernel/machine_kexec.c
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@ -24,6 +24,7 @@
#include <asm/ipl.h> #include <asm/ipl.h>
#include <asm/diag.h> #include <asm/diag.h>
#include <asm/asm-offsets.h> #include <asm/asm-offsets.h>
#include <asm/os_info.h>
typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long); typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long);
@ -114,8 +115,13 @@ static void crash_map_pages(int enable)
size % KEXEC_CRASH_MEM_ALIGN); size % KEXEC_CRASH_MEM_ALIGN);
if (enable) if (enable)
vmem_add_mapping(crashk_res.start, size); vmem_add_mapping(crashk_res.start, size);
else else {
vmem_remove_mapping(crashk_res.start, size); vmem_remove_mapping(crashk_res.start, size);
if (size)
os_info_crashkernel_add(crashk_res.start, size);
else
os_info_crashkernel_add(0, 0);
}
} }
/* /*