Messages in this thread |  | | | From | OGAWA Hirofumi <> | | Subject | Re: [PATCHSET v3.1 0/7] data integrity: Stabilize pages during writeback for various fses | | Date | Tue, 10 May 2011 22:52:10 +0900 |
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Christoph Hellwig <hch@infradead.org> writes:
> On Tue, May 10, 2011 at 10:59:15AM +0900, OGAWA Hirofumi wrote: >> I'd like to know those patches are on what state. Waiting in writeback >> page makes slower, like you mentioned it (I guess it would more >> noticeable if device was slower that like FAT uses). And I think >> currently it doesn't help anything others for blk-integrity stuff >> (without other technic, it doesn't help FS consistency)? > > It only makes things slower if we rewrite a region in a file that is > currently undergoing writeback. I'd be interested to know about real > life applications doing that, and if they really are badly affect we > should help them to work around that in userspace, e.g. by adding a > fadvice will rewrite call that might be used to never write back that > regions without an explicit fsync call.
Isn't it reallocated blocks too, and metadata too?
Thanks. -- OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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