Re: Btrfs bug with g38867a2 and a question

[Mathieu Chouquet-Stringer <mathieu@csetco.com>]

On Thu, Sep 22, 2011 at 01:10:55AM +0200, David Sterba wrote:
> please prefix printk messages with "btrfs: "

Well my computer crashed before I could reboot with the newly compiled
kernel.  And now it bugs while it tries to mount the kernel meaning my
computer is fscked! :-)

Bug at fs/btrfs/free-space-cache.c:1327

(I have a screenshot if needed)

function remove_from_bitmap

        /*
         * XXX - this can go away after a few releases.
         *
         * since the only user of btrfs_remove_free_space is the tree logging
         * stuff, and the only way to test that is under crash conditions, we
         * want to have this debug stuff here just in case somethings not
         * working.  Search the bitmap for the space we are trying to use to
         * make sure its actually there.  If its not there then we need to stop
         * because something has gone wrong.
         */
        search_start = *offset;
        search_bytes = *bytes;
        search_bytes = min(search_bytes, end - search_start + 1);
        ret = search_bitmap(ctl, bitmap_info, &search_start, &search_bytes);
===>    BUG_ON(ret < 0 || search_start != *offset);

So question is now: how do I recover from this? :-)

-- 
Mathieu Chouquet-Stringer                         mathieu@csetco.com
            The sun itself sees not till heaven clears.
	             -- William Shakespeare --