On Mon, Oct 31, 2016 at 11:55 AM, Dave Jones <da...@codemonkey.org.uk> wrote: > > BUG: Bad page state in process kworker/u8:12 pfn:4e0e39 > page:ffffea0013838e40 count:0 mapcount:0 mapping:ffff8804a20310e0 index:0x100c > flags: 0x400000000000000c(referenced|uptodate) > page dumped because: non-NULL mapping
Hmm. So this seems to be btrfs-specific, right? I searched for all your "non-NULL mapping" cases, and they all seem to have basically the same call trace, with some work thread doing writeback and going through btrfs_writepages(). Sounds like it's a race with either fallocate hole-punching or truncate. I'm not seeing it, but I suspect it's btrfs, since DaveJ clearly ran other filesystems too but I am not seeing this backtrace for anything else. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
