Help!
There must be a function which will update the data in the disk cache.
>From __make_request(), it does ordering(neighboring) the requests,
it does not deal with the same block request.
Please give me a light!
>
> It improved a lot for the sync I/O.
> However, I am looking for a solution to handle
> the regular async I/O with a page data on the
> same sector repeatedly like writing the MD SB
> data to disk without flushing.
>
> The follwing is my simple algorithm for it;
>
> bh=getblk(dev, block, size);
> if (buffer_uptodate(bh)) { /* still in cache, not flushed yet */
> bh->b_data = "updated data";
> brelse(bh);
> }
> else { /* all were flushed or new */
> .
> .
> mark_buffer_uptodate(bh,1);
> mark_buffer_dirty(bh);
> generic_make_request(rw, &bh);
> }
>
> Please give me your suggestion or comment.
>
Bo
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