Hi Joe
Thanks for your kindly response
On Thu, Sep 5, 2019 at 6:38 PM Joe Thornber wrote:
> On Thu, Sep 05, 2019 at 02:43:28PM +0800, jianchao wang wrote:
> > But why does it use this 4K page instead of btree as the disk sm ?
> >
> > The brb mechanism seem be able to avoid the nested block
On Thu, Sep 05, 2019 at 02:43:28PM +0800, jianchao wang wrote:
> But why does it use this 4K page instead of btree as the disk sm ?
>
> The brb mechanism seem be able to avoid the nested block allocation
> when do COW on the metadata sm btree.
>
> Would anyone please help to tell why does it use
Hi
As the code,
The metadata space map use following structure which locates on a 4K page
on disk
to carry the disk_index_entry.
The on-disk format of metadata spacemap
The metadata space's bitmap root is a
#define MAX_METADATA_BITMAPS 255
struct disk_metadata_index {
__le32 csum;
