cp arch/arm64/configs/hulk_defconfig .config && make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- olddefconfig && make -j64 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
scripts/kconfig/conf --olddefconfig Kconfig # # configuration written to .config # scripts/kconfig/conf --syncconfig Kconfig CC arch/arm64/kernel/asm-offsets.s In file included from ./include/linux/perf_event.h:57:0, from ./include/kvm/arm_pmu.h:21, from ./arch/arm64/include/asm/kvm_host.h:45, from ./include/linux/kvm_host.h:39, from arch/arm64/kernel/asm-offsets.c:25: ./include/linux/cgroup.h: In function ‘cgroup_psi’: ./include/linux/cgroup.h:676:30: error: implicit declaration of function ‘get_cgroup_psi’; did you mean ‘cgroup_psi’? [-Werror=implicit-function-declaration] struct cgroup_psi *cgroup = get_cgroup_psi(cgrp); ^~~~~~~~~~~~~~ cgroup_psi ./include/linux/cgroup.h:676:30: warning: initialization makes pointer from integer without a cast [-Wint-conversion] ./include/linux/cgroup.h:677:16: error: dereferencing pointer to incomplete type ‘struct cgroup_psi’ return &cgroup->psi; ^~ cc1: some warnings being treated as errors Kbuild:56: recipe for target 'arch/arm64/kernel/asm-offsets.s' failed make[1]: *** [arch/arm64/kernel/asm-offsets.s] Error 1 Makefile:1119: recipe for target 'prepare0' failed make: *** [prepare0] Error 2
在 2021/10/13 20:30, Liu Xinpeng 写道:
From: Johannes Weiner hannes@cmpxchg.org
mainline inclusion from mainline-v5.4 commit 8508cf3ffad4defa202b303e5b6379efc4cd9054 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47QS2 CVE: NA
There are several definitions of those functions/macros in places that mess with fixed-point load averages. Provide an official version.
[akpm@linux-foundation.org: fix missed conversion in block/blk-iolatency.c] Link: http://lkml.kernel.org/r/20180828172258.3185-5-hannes@cmpxchg.org Signed-off-by: Johannes Weiner hannes@cmpxchg.org Acked-by: Peter Zijlstra (Intel) peterz@infradead.org Tested-by: Suren Baghdasaryan surenb@google.com Tested-by: Daniel Drake drake@endlessm.com Cc: Christopher Lameter cl@linux.com Cc: Ingo Molnar mingo@redhat.com Cc: Johannes Weiner jweiner@fb.com Cc: Mike Galbraith efault@gmx.de Cc: Peter Enderborg peter.enderborg@sony.com Cc: Randy Dunlap rdunlap@infradead.org Cc: Shakeel Butt shakeelb@google.com Cc: Tejun Heo tj@kernel.org Cc: Vinayak Menon vinmenon@codeaurora.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Liu Xinpeng liuxp11@chinatelecom.cn Signed-off-by: Ctyun Kernel ctyuncommiter01@chinatelecom.cn
arch/powerpc/platforms/cell/cpufreq_spudemand.c | 2 +- arch/powerpc/platforms/cell/spufs/sched.c | 9 +++------ arch/s390/appldata/appldata_os.c | 4 ---- block/blk-iolatency.c | 8 +++++--- drivers/cpuidle/governors/menu.c | 4 ---- fs/proc/loadavg.c | 3 --- include/linux/sched/loadavg.h | 21 +++++++++++++++++---- kernel/debug/kdb/kdb_main.c | 7 +------ kernel/sched/loadavg.c | 15 --------------- 9 files changed, 27 insertions(+), 46 deletions(-)
diff --git a/arch/powerpc/platforms/cell/cpufreq_spudemand.c b/arch/powerpc/platforms/cell/cpufreq_spudemand.c index 882944c..5d8e8b6 100644 --- a/arch/powerpc/platforms/cell/cpufreq_spudemand.c +++ b/arch/powerpc/platforms/cell/cpufreq_spudemand.c @@ -49,7 +49,7 @@ static int calc_freq(struct spu_gov_info_struct *info) cpu = info->policy->cpu; busy_spus = atomic_read(&cbe_spu_info[cpu_to_node(cpu)].busy_spus);
- CALC_LOAD(info->busy_spus, EXP, busy_spus * FIXED_1);
- info->busy_spus = calc_load(info->busy_spus, EXP, busy_spus * FIXED_1); pr_debug("cpu %d: busy_spus=%d, info->busy_spus=%ld\n", cpu, busy_spus, info->busy_spus);
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c index c9ef3c5..9fcccb4 100644 --- a/arch/powerpc/platforms/cell/spufs/sched.c +++ b/arch/powerpc/platforms/cell/spufs/sched.c @@ -987,9 +987,9 @@ static void spu_calc_load(void) unsigned long active_tasks; /* fixed-point */
active_tasks = count_active_contexts() * FIXED_1;
- CALC_LOAD(spu_avenrun[0], EXP_1, active_tasks);
- CALC_LOAD(spu_avenrun[1], EXP_5, active_tasks);
- CALC_LOAD(spu_avenrun[2], EXP_15, active_tasks);
spu_avenrun[0] = calc_load(spu_avenrun[0], EXP_1, active_tasks);
spu_avenrun[1] = calc_load(spu_avenrun[1], EXP_5, active_tasks);
spu_avenrun[2] = calc_load(spu_avenrun[2], EXP_15, active_tasks); }
static void spusched_wake(struct timer_list *unused)
@@ -1071,9 +1071,6 @@ void spuctx_switch_state(struct spu_context *ctx, } }
-#define LOAD_INT(x) ((x) >> FSHIFT) -#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
- static int show_spu_loadavg(struct seq_file *s, void *private) { int a, b, c;
diff --git a/arch/s390/appldata/appldata_os.c b/arch/s390/appldata/appldata_os.c index 433a994..54f3756 100644 --- a/arch/s390/appldata/appldata_os.c +++ b/arch/s390/appldata/appldata_os.c @@ -25,10 +25,6 @@
#include "appldata.h"
-#define LOAD_INT(x) ((x) >> FSHIFT) -#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
- /*
- OS data
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c index aa220dc..4619963 100644 --- a/block/blk-iolatency.c +++ b/block/blk-iolatency.c @@ -154,7 +154,7 @@ struct iolatency_grp { #define BLKIOLATENCY_MAX_WIN_SIZE NSEC_PER_SEC /*
- These are the constants used to fake the fixed-point moving average
- calculation just like load average. The call to CALC_LOAD folds
- calculation just like load average. The call to calc_load() folds
- (FIXED_1 (2048) - exp_factor) * new_sample into lat_avg. The sampling
- window size is bucketed to try to approximately calculate average
- latency such that 1/exp (decay rate) is [1 min, 2.5 min) when windows
@@ -249,7 +249,7 @@ static inline void iolat_update_total_lat_avg(struct iolatency_grp *iolat, return;
/*
* CALC_LOAD takes in a number stored in fixed point representation.
* calc_load() takes in a number stored in fixed point representation.
- Because we are using this for IO time in ns, the values stored
- are significantly larger than the FIXED_1 denominator (2048).
- Therefore, rounding errors in the calculation are negligible and
@@ -258,7 +258,9 @@ static inline void iolat_update_total_lat_avg(struct iolatency_grp *iolat, exp_idx = min_t(int, BLKIOLATENCY_NR_EXP_FACTORS - 1, div64_u64(iolat->cur_win_nsec, BLKIOLATENCY_EXP_BUCKET_SIZE));
- CALC_LOAD(iolat->lat_avg, iolatency_exp_factors[exp_idx], stat->rqs.mean);
iolat->lat_avg = calc_load(iolat->lat_avg,
iolatency_exp_factors[exp_idx],stat->rqs.mean);}
static inline bool iolatency_may_queue(struct iolatency_grp *iolat,
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index 8054359..735dede 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -130,10 +130,6 @@ struct menu_device { int interval_ptr; };
-#define LOAD_INT(x) ((x) >> FSHIFT) -#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
- static inline int get_loadavg(unsigned long load) { return LOAD_INT(load) * 10 + LOAD_FRAC(load) / 10;
diff --git a/fs/proc/loadavg.c b/fs/proc/loadavg.c index d066947..8468bae 100644 --- a/fs/proc/loadavg.c +++ b/fs/proc/loadavg.c @@ -10,9 +10,6 @@ #include <linux/seqlock.h> #include <linux/time.h>
-#define LOAD_INT(x) ((x) >> FSHIFT) -#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
- static int loadavg_proc_show(struct seq_file *m, void *v) { unsigned long avnrun[3];
diff --git a/include/linux/sched/loadavg.h b/include/linux/sched/loadavg.h index 80bc84b..cc9cc62 100644 --- a/include/linux/sched/loadavg.h +++ b/include/linux/sched/loadavg.h @@ -22,10 +22,23 @@ #define EXP_5 2014 /* 1/exp(5sec/5min) */ #define EXP_15 2037 /* 1/exp(5sec/15min) */
-#define CALC_LOAD(load,exp,n) \
- load *= exp; \
- load += n*(FIXED_1-exp); \
- load >>= FSHIFT;
+/*
- a1 = a0 * e + a * (1 - e)
- */
+static inline unsigned long +calc_load(unsigned long load, unsigned long exp, unsigned long active) +{
- unsigned long newload;
- newload = load * exp + active * (FIXED_1 - exp);
- if (active >= load)
newload += FIXED_1-1;- return newload / FIXED_1;
+}
+#define LOAD_INT(x) ((x) >> FSHIFT) +#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
extern void calc_global_load(unsigned long ticks);
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c index dc6bf35..cdde394 100644 --- a/kernel/debug/kdb/kdb_main.c +++ b/kernel/debug/kdb/kdb_main.c @@ -2556,16 +2556,11 @@ static int kdb_summary(int argc, const char **argv) } kdb_printf("%02ld:%02ld\n", val.uptime/(60*60), (val.uptime/60)%60);
- /* lifted from fs/proc/proc_misc.c::loadavg_read_proc() */
-#define LOAD_INT(x) ((x) >> FSHIFT) -#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) kdb_printf("load avg %ld.%02ld %ld.%02ld %ld.%02ld\n", LOAD_INT(val.loads[0]), LOAD_FRAC(val.loads[0]), LOAD_INT(val.loads[1]), LOAD_FRAC(val.loads[1]), LOAD_INT(val.loads[2]), LOAD_FRAC(val.loads[2])); -#undef LOAD_INT -#undef LOAD_FRAC
- /* Display in kilobytes */ #define K(x) ((x) << (PAGE_SHIFT - 10)) kdb_printf("\nMemTotal: %8lu kB\nMemFree: %8lu kB\n"
diff --git a/kernel/sched/loadavg.c b/kernel/sched/loadavg.c index a171c12..54fbdfb 100644 --- a/kernel/sched/loadavg.c +++ b/kernel/sched/loadavg.c @@ -91,21 +91,6 @@ long calc_load_fold_active(struct rq *this_rq, long adjust) return delta; }
-/*
- a1 = a0 * e + a * (1 - e)
- */
-static unsigned long -calc_load(unsigned long load, unsigned long exp, unsigned long active) -{
- unsigned long newload;
- newload = load * exp + active * (FIXED_1 - exp);
- if (active >= load)
newload += FIXED_1-1;- return newload / FIXED_1;
-}
- #ifdef CONFIG_NO_HZ_COMMON /*
- Handle NO_HZ for the global load-average.