From d5cd0343d2878b66e25e044f644563c6bf708833 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Thu, 19 Feb 2009 15:19:00 +0100 Subject: [S390] Fix timeval regression on s390 commit aa5e97ce4bbc9d5daeec16b1d15bb3f6b7b4f4d4 [PATCH] improve precision of process accounting. Introduced a timing regression: -bash-3.2# time ls real 0m0.006s user 0m1.754s sys 0m1.094s The problem was introduced by an error in cputime_to_timeval. Cputime is now 1/4096 microsecond, therefore, we have to divide the remainder with 4096 to get the microseconds. Signed-off-by: Christian Borntraeger Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/cputime.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h index 521726430af..95b0f7db3c6 100644 --- a/arch/s390/include/asm/cputime.h +++ b/arch/s390/include/asm/cputime.h @@ -145,7 +145,7 @@ cputime_to_timeval(const cputime_t cputime, struct timeval *value) value->tv_usec = rp.subreg.even / 4096; value->tv_sec = rp.subreg.odd; #else - value->tv_usec = cputime % 4096000000ULL; + value->tv_usec = (cputime % 4096000000ULL) / 4096; value->tv_sec = cputime / 4096000000ULL; #endif } -- cgit v1.2.3 From 23d75d9cadd79bc9fd6553857d57c679cf18d4cb Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Thu, 19 Feb 2009 15:19:01 +0100 Subject: [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 Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/setup.h | 2 ++ arch/s390/kernel/setup.c | 9 +++++++-- 2 files changed, 9 insertions(+), 2 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index 2bd9faeb391..e8bd6ac22c9 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -43,6 +43,8 @@ struct mem_chunk { extern struct mem_chunk memory_chunk[]; extern unsigned long real_memory_size; +extern int memory_end_set; +extern unsigned long memory_end; void detect_memory_layout(struct mem_chunk chunk[]); diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index d825f4950e4..c5cfb6185ea 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -82,7 +82,9 @@ char elf_platform[ELF_PLATFORM_SIZE]; struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ -static unsigned long __initdata memory_end; + +int __initdata memory_end_set; +unsigned long __initdata memory_end; /* * This is set up by the setup-routine at boot-time @@ -281,6 +283,7 @@ void (*pm_power_off)(void) = machine_power_off; static int __init early_parse_mem(char *p) { memory_end = memparse(p, &p); + memory_end_set = 1; return 0; } early_param("mem", early_parse_mem); @@ -508,8 +511,10 @@ static void __init setup_memory_end(void) int i; #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) - if (ipl_info.type == IPL_TYPE_FCP_DUMP) + if (ipl_info.type == IPL_TYPE_FCP_DUMP) { memory_end = ZFCPDUMP_HSA_SIZE; + memory_end_set = 1; + } #endif memory_size = 0; memory_end &= PAGE_MASK; -- cgit v1.2.3