#3689: bdbuf: Replace automatic read-ahead with rtems_bdbuf_peek()
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Reporter: Sebastian Huber | Owner: Sebastian Huber
Type: enhancement | Status: assigned
Priority: normal | Milestone: 5.1
Component: lib/block | Version: 5
Severity: normal | Keywords:
Blocked By: | Blocking:
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The block device cache (bdbuf) tries to deduce a read ahead opportunity
from the read access pattern. Using real world FAT file systems showed
that this is not very reliable and the read ahead seldom happens. One way
to fix this issue is let file systems give a hint to the block device
cache that they will likely read a certain block in the future, e.g. the
next block in a sequential file read. Remove the existing read ahead logic
and add a new function rtems_bdbuf_peek() instead.
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Ticket URL: <http://devel.rtems.org/ticket/3689>
RTEMS Project <http://www.rtems.org/>
RTEMS Project
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