On Thu, Jun 28, 2012 at 02:55:51PM +0200, Andrea Arcangeli wrote:
> These flags are the ones tweaked through sysfs, they control the
> behavior of autonuma, from enabling disabling it, to selecting various
> runtime options.
>
> Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> ---
> include/linux/autonuma_flags.h | 62 ++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 62 insertions(+), 0 deletions(-)
> create mode 100644 include/linux/autonuma_flags.h
>
> diff --git a/include/linux/autonuma_flags.h b/include/linux/autonuma_flags.h
> new file mode 100644
> index 0000000..5e29a75
> --- /dev/null
> +++ b/include/linux/autonuma_flags.h
> @@ -0,0 +1,62 @@
> +#ifndef _LINUX_AUTONUMA_FLAGS_H
> +#define _LINUX_AUTONUMA_FLAGS_H
> +
> +enum autonuma_flag {
These aren't really flags. They are bit-fields.
A
> + AUTONUMA_FLAG,
Looking at the code, this is to turn it on. Perhaps a better name such
as: AUTONUMA_ACTIVE_FLAG ?
> + AUTONUMA_IMPOSSIBLE_FLAG,
> + AUTONUMA_DEBUG_FLAG,
> + AUTONUMA_SCHED_LOAD_BALANCE_STRICT_FLAG,
I might have gotten my math wrong, but if you have
AUTONUMA_SCHED_LOAD_BALACE.. set (so 3), that also means
that bit 0 and 1 are on. In other words AUTONUMA_FLAG
and AUTONUMA_IMPOSSIBLE_FLAG are turned on.
> + AUTONUMA_SCHED_CLONE_RESET_FLAG,
> + AUTONUMA_SCHED_FORK_RESET_FLAG,
> + AUTONUMA_SCAN_PMD_FLAG,
So this is 6, which means 110 bits. So AUTONUMA_FLAG
gets turned off.
You definitly want to convert these to #defines or
at least define the proper numbers.
> + AUTONUMA_SCAN_USE_WORKING_SET_FLAG,
> + AUTONUMA_MIGRATE_DEFER_FLAG,
> +};
> +
> +extern unsigned long autonuma_flags;
> +
> +static inline bool autonuma_enabled(void)
> +{
> + return !!test_bit(AUTONUMA_FLAG, &autonuma_flags);
> +}
> +
> +static inline bool autonuma_debug(void)
> +{
> + return !!test_bit(AUTONUMA_DEBUG_FLAG, &autonuma_flags);
> +}
> +
> +static inline bool autonuma_sched_load_balance_strict(void)
> +{
> + return !!test_bit(AUTONUMA_SCHED_LOAD_BALANCE_STRICT_FLAG,
> + &autonuma_flags);
> +}
> +
> +static inline bool autonuma_sched_clone_reset(void)
> +{
> + return !!test_bit(AUTONUMA_SCHED_CLONE_RESET_FLAG,
> + &autonuma_flags);
> +}
> +
> +static inline bool autonuma_sched_fork_reset(void)
> +{
> + return !!test_bit(AUTONUMA_SCHED_FORK_RESET_FLAG,
> + &autonuma_flags);
> +}
> +
> +static inline bool autonuma_scan_pmd(void)
> +{
> + return !!test_bit(AUTONUMA_SCAN_PMD_FLAG, &autonuma_flags);
> +}
> +
> +static inline bool autonuma_scan_use_working_set(void)
> +{
> + return !!test_bit(AUTONUMA_SCAN_USE_WORKING_SET_FLAG,
> + &autonuma_flags);
> +}
> +
> +static inline bool autonuma_migrate_defer(void)
> +{
> + return !!test_bit(AUTONUMA_MIGRATE_DEFER_FLAG, &autonuma_flags);
> +}
> +
> +#endif /* _LINUX_AUTONUMA_FLAGS_H */
>
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