>How about defining a maximum number of swap pages to write to disk at
>a time? Does kernel really have to wait for the disk operation to complete?
We just have such limit for the swap and it's set to 32 pages if I remeber
well. In the normal write to disk (via filesystem) case instead the limit
is forced to the 42 requests slot shared by all block-writes operations.
That make sense but it become an overkill for reads if we are writing
continously to disk.
Andrea Arcangeli
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