On 09/22/2011 02:05 AM, Mathieu Chouquet-Stringer wrote:
>
> On Sep 22, 2011 1:11 AM, "David Sterba" <d...@jikos.cz
> <mailto:d...@jikos.cz>> wrote:
>>
>> On Wed, Sep 21, 2011 at 04:18:29PM -0400, Josef Bacik wrote:
>> > diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
>> > index b128fa0..66ba0a7 100644
>> > --- a/fs/btrfs/inode.c
>> > +++ b/fs/btrfs/inode.c
>> > @@ -782,7 +782,12 @@ static noinline int cow_file_range(struct inode
> *inode,
>> > struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
>> > int ret = 0;
>> >
>> > - BUG_ON(btrfs_is_free_space_inode(root, inode));
>> > + if (btrfs_is_free_space_inode(root, inode)) {
>> > + printk(KERN_ERR "trying to write to free space inode, "
>> > + "isize=%Lu, start=%Lu, end=%Lu\n",
> i_size_read(inode),
>> > + start, end);
>>
>> please prefix printk messages with "btrfs: "
>
> Well this time it doesn't boot anymore...
> Bug at fs/btrfs/free-space-cache.c:1327
>
> I had another crash before being able to reboot...
>
> Is there a way to recover from that? How do I disable space cache?
>
Well that is from the tree logging code, so give this a whirl. It's
going to dump a lot of info so make sure you capture everything before
the --- cut here --- line. Thanks,
Josef
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 1bcbe76..236a938 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -417,6 +417,8 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
}
if (entry->type == BTRFS_FREE_SPACE_EXTENT) {
+ printk(KERN_ERR "adding extent [%llu-%llu]\n",
+ e->offset, e->bytes);
spin_lock(&block_group->tree_lock);
ret = link_free_space(block_group, e);
spin_unlock(&block_group->tree_lock);
@@ -431,6 +433,8 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
page_cache_release(page);
goto free_cache;
}
+ printk(KERN_ERR "adding bitmap [%llu-%llu]\n",
+ e->offset, e->bytes);
spin_lock(&block_group->tree_lock);
ret = link_free_space(block_group, e);
block_group->total_bitmaps++;
--
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