Messages in this thread |  | | Date | Thu, 21 Dec 2000 22:38:04 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: [RFC] changes to buffer.c (was Test12 ll_rw_block error) |
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On Thu, 21 Dec 2000, Andreas Dilger wrote:
> Marcelo Tosatti writes: > > It seems your code has a problem with bh flush time. > > > > In flush_dirty_buffers(), a buffer may (if being called from kupdate) only > > be written in case its old enough. (bh->b_flushtime) > > > > If the flush happens for an anonymous buffer, you'll end up writing all > > buffers which are sitting on the same page (with block_write_anon_page), > > but these other buffers are not necessarily old enough to be flushed. > > This isn't really a "problem" however. The page is the _maximum_ age of > the buffer before it needs to be written. If we can efficiently write it > out with another buffer
> (essentially for free if they are on the same spot on disk)
Are you sure this is true for buffer pages in most cases?
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