Hi, While testing hotplug memory remove, I ran into this issue. Given a range of pages hotplug memory remove tries to migrate those pages. migrate_pages() keeps failing to migrate pages containing pagecache pages for reiserfs files. I noticed that reiserfs doesn't have ->migratepage() ops. So, fallback_migrate_page() code tries to do try_to_release_page(). try_to_release_page() fails to drop_buffers() since b_count == 1. Here is what my debug shows: migrate pages failed pfn 258111/flags 3f00000000801 bh c00000000b53f6e0 flags 110029 count 1 Any one know why the b_count == 1 and not getting dropped to zero ? Thanks, Badari - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
