I had all cpus spinning in swap_info_get(), for the lock on an area being swapped off: probably because get_swap_page() forgot to unlock.
Signed-off-by: Hugh Dickins <hu...@google.com> --- mm/swapfile.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- mmotm.orig/mm/swapfile.c 2013-01-23 17:55:39.132447115 -0800 +++ mmotm/mm/swapfile.c 2013-01-27 10:41:45.000000000 -0800 @@ -470,10 +470,9 @@ swp_entry_t get_swap_page(void) spin_unlock(&swap_lock); /* This is called for allocating swap entry for cache */ offset = scan_swap_map(si, SWAP_HAS_CACHE); - if (offset) { - spin_unlock(&si->lock); + spin_unlock(&si->lock); + if (offset) return swp_entry(type, offset); - } spin_lock(&swap_lock); next = swap_list.next; } -- 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/