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s390/kdump: Do not add standby memory for kdump

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Standby memory that is located outside [0,OLDMEM_SIZE] is currently used
by the s390 memory detection. This leads to additional memory consumption
due to allocation of page structures. To fix this, we now do not
add standby memory if the kernel is started in kdump mode.

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 2013-03-08 09:29:34 +01:00 committed by Martin Schwidefsky
parent aaaf9cf71c
commit 52319b457c
1 changed files with 2 additions and 0 deletions
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2
drivers/s390/char/sclp_cmd.c
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@ -627,6 +627,8 @@ static int __init sclp_detect_standby_memory(void)
struct read_storage_sccb *sccb;
int i, id, assigned, rc;
if (OLDMEM_BASE) /* No standby memory in kdump mode */
return 0;
if (!early_read_info_sccb_valid)
return 0;
if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL)