On 2014-05-27 09:03, Mikulas Patocka wrote:
The block layer uses per-process bio list to avoid recursion in generic_make_request. When generic_make_request is called recursively, the bio is added to current->bio_list and the function returns immediatelly. The top-level instance of generic_make_requests takes bios from current->bio_list and processes them.
This really begs the question of why we just don't use the per-process plugs for this. We already have scheduler hooks in place to flush those at the appropriate time. Why are we reinventing something for essentially the same thing?
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