Re: Why we need delayed allocation!

>>>>> Nikita Danilov (ND) writes:

 ND> One can do block allocation from ->writepages() (i.e., when writer is
 ND> throttled by balance_dirty_pages(), or from pdflush), like reiser4
 ND> does. ->writepages() operates on the whole file, so allocation will not
 ND> depend on the order of pages in the VM lists.

actually, this is what I do. ->writepages() tries to find unallocated
extents, allocate them and calls mpage_writepages() to do real flushing.



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