try to trap an invalidation oddity. fs/buffer.c | 3 +++ 1 files changed, 3 insertions(+) diff -puN fs/buffer.c~buffer-debug fs/buffer.c --- 25/fs/buffer.c~buffer-debug 2003-05-13 00:44:38.000000000 -0700 +++ 25-akpm/fs/buffer.c 2003-05-13 00:44:38.000000000 -0700 @@ -409,6 +409,9 @@ __find_get_block_slow(struct block_devic bh = bh->b_this_page; } while (bh != head); buffer_error(); + printk("block=%llu, b_blocknr=%llu\n", + (unsigned long long)block, (unsigned long long)bh->b_blocknr); + printk("b_state=0x%08lx, b_size=%u\n", bh->b_state, bh->b_size); out_unlock: spin_unlock(&bd_mapping->private_lock); page_cache_release(page); _