This patch just adds the necessary bits to the task_struct so that the scans can eventually be controlled on a per-mm basis. As I mentioned previously, we might want to add some more counters here.
Signed-off-by: Alex Thorlton <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Bob Liu <[email protected]> Cc: David Rientjes <[email protected]> Cc: Eric W. Biederman <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Kees Cook <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vladimir Davydov <[email protected]> Cc: [email protected] --- include/linux/sched.h | 12 ++++++++++++ kernel/fork.c | 6 ++++++ 2 files changed, 18 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index 5e344bb..109be66 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1661,6 +1661,18 @@ struct task_struct { unsigned int sequential_io; unsigned int sequential_io_avg; #endif +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + struct callback_head pgcollapse_work; + /* default scan 8*512 pte (or vmas) every 30 second */ + unsigned int pgcollapse_pages_to_scan; + unsigned int pgcollapse_pages_collapsed; + unsigned int pgcollapse_full_scans; + unsigned int pgcollapse_scan_sleep_millisecs; + /* during fragmentation poll the hugepage allocator once every minute */ + unsigned int pgcollapse_alloc_sleep_millisecs; + unsigned long pgcollapse_last_scan; + unsigned long pgcollapse_scan_address; +#endif }; /* Future-safe accessor for struct task_struct's cpus_allowed. */ diff --git a/kernel/fork.c b/kernel/fork.c index 9b7d746..8c55309 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1355,6 +1355,12 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->sequential_io = 0; p->sequential_io_avg = 0; #endif +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + /* need to pull these values from sysctl or something */ + p->pgcollapse_pages_to_scan = HPAGE_PMD_NR * 8; + p->pgcollapse_scan_sleep_millisecs = 10000; + p->pgcollapse_alloc_sleep_millisecs = 60000; +#endif /* Perform scheduler related setup. Assign this task to a CPU. */ retval = sched_fork(clone_flags, p); -- 1.7.12.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
