A hugetlb_falloc structure is pointed to by i_private during fallocate hole punch operations. Page faults check this structure and if they are in the hole, wait for the operation to finish.
Signed-off-by: Mike Kravetz <[email protected]> --- include/linux/hugetlb.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 685c262..4be35b9 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -42,6 +42,16 @@ struct resv_map { extern struct resv_map *resv_map_alloc(void); void resv_map_release(struct kref *ref); +/* + * hugetlb_falloc is used to prevent page faults during falloc hole punch + * operations. During hole punch, inode->i_private points to this struct. + */ +struct hugetlb_falloc { + wait_queue_head_t *waitq; /* Page faults waiting on hole punch */ + pgoff_t start; /* Start of fallocate hole */ + pgoff_t end; /* End of fallocate hole */ +}; + extern spinlock_t hugetlb_lock; extern int hugetlb_max_hstate __read_mostly; #define for_each_hstate(h) \ -- 2.4.3 -- 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/
