Vladislav Bolkhovitin <vst@xxxxxxxx> writes:
Wu Fengguang wrote:Another scheme is to detect the sequential pattern via looking upI think, this should be the best and the simplest way to go. Since in
the page cache, which provides one single and consistent view of the
pages recently accessed. That makes sequential detection possible.
The cost will be one extra page cache lookup per random read.
If it's not acceptable, the corresponding code could be disabled
by default.
most case data from the cache should be later copied to user, one more
page cache lookup should be negligible.
I haven't thought about your suggestion in any detail, but it seems to
me that you will not handle O_DIRECT I/O with this scheme.
Cheers,--
Jeff
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