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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-02-19 15:19:01 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-02-19 15:19:19 +0100 |
| commit | 23d75d9cadd79bc9fd6553857d57c679cf18d4cb (patch) | |
| tree | 647e18bd1a1ee86efe82dab68e446164c1ad13de /drivers/s390/char/sclp_cmd.c | |
| parent | d5cd0343d2878b66e25e044f644563c6bf708833 (diff) | |
| download | lwn-23d75d9cadd79bc9fd6553857d57c679cf18d4cb.tar.gz lwn-23d75d9cadd79bc9fd6553857d57c679cf18d4cb.zip | |
[S390] fix "mem=" handling in case of standby memory
Standby memory detected with the sclp interface gets always registered
with add_memory calls without considering the limitationt that the
"mem=" kernel paramater implies.
So fix this and only register standby memory that is below the specified
limit.
This fixes zfcpdump since it uses "mem=32M". In case there is appr.
2GB standby memory present all of usable memory would be used for the
struct pages needed for standby memory.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp_cmd.c')
| -rw-r--r-- | drivers/s390/char/sclp_cmd.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index 506390496416..77ab6e34a100 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -19,6 +19,7 @@ #include <linux/memory.h> #include <asm/chpid.h> #include <asm/sclp.h> +#include <asm/setup.h> #include "sclp.h" @@ -474,6 +475,10 @@ static void __init add_memory_merged(u16 rn) goto skip_add; if (start + size > VMEM_MAX_PHYS) size = VMEM_MAX_PHYS - start; + if (memory_end_set && (start >= memory_end)) + goto skip_add; + if (memory_end_set && (start + size > memory_end)) + size = memory_end - start; add_memory(0, start, size); skip_add: first_rn = rn; |