fragmentation_index may return -1000 and the corresponding formated value
showed by seq_printf will take a negative signatrue, but other positive
formated values don't take a positive signatrue, so the output becomes
unaligned.
before:
Node 0, zone DMA -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000
Node 0, zone DMA32 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000
Node 0, zone Normal -1.000 -1.000 -1.000 -1.000 0.931 0.966 0.983 0.992 0.996 0.998 0.999
after this patch:
Node 0, zone DMA -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000
Node 0, zone DMA32 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000
Node 0, zone Normal -1.000 -1.000 -1.000 -1.000 0.931 0.966 0.983 0.992 0.996 0.998 0.999
Signed-off-by: Lin Feng <linf@xxxxxxxxxx>
---
mm/vmstat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 8ce2620344b2..263d367d193b 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -2179,7 +2179,7 @@ static void extfrag_show_print(struct seq_file *m,
for (order = 0; order < MAX_ORDER; ++order) {
fill_contig_page_info(zone, order, &info);
index = __fragmentation_index(order, &info);
- seq_printf(m, "%d.%03d ", index / 1000, index % 1000);
+ seq_printf(m, "%2d.%03d ", index / 1000, index % 1000);
}
seq_putc(m, '\n');
--
2.31.1
