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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-03-10 14:50:16 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-03-17 15:53:06 +0100 |
| commit | cf813db0b448b45b454f0983329c3c7b007f9ab7 (patch) | |
| tree | 2ccbddbc0c1494d92e4fa4f1c2f7d337595e1dd2 /arch/s390/include/asm/sclp.h | |
| parent | hypfs: Add clarification for "weight_min" attribute (diff) | |
| download | linux-dev-cf813db0b448b45b454f0983329c3c7b007f9ab7.tar.xz linux-dev-cf813db0b448b45b454f0983329c3c7b007f9ab7.zip | |
s390/smp: limit number of cpus in possible cpu mask
Limit the number of bits to the maximum number of cpus a machine
can have.
possible_cpu_mask typically will have more bits set than a machine
may physically have. This results in wasted memory during per-cpu
memory allocations, if the possible mask contains more cpus than
physically possible for a given configuration.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/sclp.h')
| -rw-r--r-- | arch/s390/include/asm/sclp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index abaca2275c7a..2f5e9932b4de 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -46,6 +46,7 @@ int sclp_cpu_configure(u8 cpu); int sclp_cpu_deconfigure(u8 cpu); unsigned long long sclp_get_rnmax(void); unsigned long long sclp_get_rzm(void); +unsigned int sclp_get_max_cpu(void); int sclp_sdias_blk_count(void); int sclp_sdias_copy(void *dest, int blk_num, int nr_blks); int sclp_chp_configure(struct chp_id chpid); |