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Added support for handling corrupted blocks

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This provides a limited form of wear leveling. While wear is
not actually balanced across blocks, the filesystem can recover
from corrupted blocks and extend the lifetime of a device nearly
as much as dynamic wear leveling.

For use-cases where wear is important, it would be better to use
a full form of dynamic wear-leveling at the block level. (or
consider a logging filesystem).

Corrupted block handling was simply added on top of the existing
logic in place for the filesystem, so it's a bit more noodly than
it may have to be, but it gets the work done.
This commit is contained in:
Christopher Haster
2017-05-14 12:01:45 -05:00
parent b35d761196
commit fd1da602d7
8 changed files with 634 additions and 311 deletions
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Makefile
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@@ -32,7 +32,7 @@ size: $(OBJ)
.SUFFIXES:
test: test_format test_dirs test_files test_seek test_parallel \
test_alloc test_paths test_orphan
test_alloc test_paths test_orphan test_corrupt
test_%: tests/test_%.sh
./$<