Changeset a9619f3c in rtems
- Timestamp:
-
12/18/13 17:00:42
(10 years ago)
- Author:
- Alan Cudmore <alan.cudmore@…>
- Branches:
- 4.11, 5, master
- Children:
- 1ab4f76
- Parents:
- 9b48dc6
- git-author:
- Alan Cudmore <alan.cudmore@…> (12/18/13 17:00:42)
- git-committer:
- Chris Johns <chrisj@…> (12/19/13 00:07:47)
- Message:
-
For PR 2164 - RFS File System - fix bitmap_create_search loop bug
This is for the RFS file system. There is a bug in the
rtems_rfs_bitmap_create_search loop. It is supposed to iterate
over the range of bits in a search element ( usually 32 bits ),
so it should loop through bits 0 through 31. Instead it loops
through 0 - 32, causing some blocks not to be allocated. As in
PR 2163, this depends on the block size and number of blocks in
a file system. Block sizes and group sizes that are powers of 2
seem to work fine ( 512 byte blocks, 4096 block groups, etc ).
When the block sizes are not powers of 2, then this loop error
causes some of the blocks at the end of a group to be skipped,
preventing 100% of the blocks from being used. A simple test
for this and PR2163 is to create a RAM disk with block size
3900 and at least 1 full group ( 31200 blocks ). A file system
with these sizes will not be able to allocate 100% of the blocks.
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(No files)
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