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    SubjectRe: [PATCH 1/3] bdi: Use parent filesystem BDI for inodes not capable of writeback
    On Tue, Jul 27, 2010 at 07:24:38PM +0200, Jan Kara wrote:
    > Always returning inode->i_sb->s_bdi wouldn't be a right thing IMHO.
    > That would file inode for /dev/sda to BDI list of tmpfs mounted on /dev/
    > which isn't what you want...

    It shouldn't. Block device nodes are on the bdev filesystems, and
    we twist the file->mapping pointer so that all the low-level read/write
    code always deals with the bdev fs inode, and not the device node
    filesystem.



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