Messages in this thread | | | Date | Tue, 10 May 2011 13:03:39 -0400 | From | Christoph Hellwig <> | Subject | Re: [PATCHSET v3.1 0/7] data integrity: Stabilize pages during writeback for various fses |
| |
On Wed, May 11, 2011 at 12:24:58AM +0900, OGAWA Hirofumi wrote: > > under writeback and when it's freed no writeback is started. > > Sure for data -> data reallocated case. metadata -> data/metadata is > still there.
That's usually handled differently. For XFS take a look at the xfs_alloc_busy_* function. For 2.6.40 they've been mostly rewritten to rarely wait for the reuse but instead avoid busy blocks. But that's a real data integrity issue even without stable pages for I/O.
| |