Messages in this thread Patch in this message | | | From | Jamie Liu <> | Subject | [PATCH] swap: do not skip lowest_bit in scan_swap_map() scan loop | Date | Tue, 21 Jan 2014 18:21:16 -0800 |
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In the second half of scan_swap_map()'s scan loop, offset is set to si->lowest_bit and then incremented before entering the loop for the first time, causing si->swap_map[si->lowest_bit] to be skipped.
Signed-off-by: Jamie Liu <jamieliu@google.com> --- mm/swapfile.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c index 612a7c9..6635081 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -616,7 +616,7 @@ scan: } } offset = si->lowest_bit; - while (++offset < scan_base) { + while (offset < scan_base) { if (!si->swap_map[offset]) { spin_lock(&si->lock); goto checks; @@ -629,6 +629,7 @@ scan: cond_resched(); latency_ration = LATENCY_LIMIT; } + offset++; } spin_lock(&si->lock); -- 1.8.5.3
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