This patch introduces 'pagesize' line element to /proc/<pid>/numa_maps report file in order to help disambiguating the size of pages that are backing memory areas mapped by a task. When the VMA backing page size is observed different from kernel's default PAGE_SIZE, the new element is printed out to complement report output. This is specially useful to help differentiating between HUGE and GIGANTIC page VMAs.
This patch is based on Dave Hansen's proposal and reviewer's follow ups taken from this dicussion: https://lkml.org/lkml/2011/9/21/454 Signed-off-by: Rafael Aquini <aqu...@redhat.com> --- fs/proc/task_mmu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 246eae8..9f2e2c8 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1479,6 +1479,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid) struct mm_struct *mm = vma->vm_mm; struct mm_walk walk = {}; struct mempolicy *pol; + unsigned long page_size; char buffer[64]; int nid; @@ -1533,6 +1534,10 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid) if (!md->pages) goto out; + page_size = vma_kernel_pagesize(vma); + if (page_size != PAGE_SIZE) + seq_printf(m, " pagesize=%lu", page_size); + if (md->anon) seq_printf(m, " anon=%lu", md->anon); -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
