diff options
| author | Tom Rini <trini@konsulko.com> | 2022-10-29 03:26:59 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-11-10 17:45:54 +0300 |
| commit | 3b677dcd9d6b1fcaa9affd2289744756bcda1165 (patch) | |
| tree | c219dbeab2bedf15d65835df0c0b7f4cc7296ace | |
| parent | e020b974cef577cc29a799cffd172e16245c6569 (diff) | |
| download | u-boot-3b677dcd9d6b1fcaa9affd2289744756bcda1165.tar.xz | |
fs: jffs2: Move SYS_JFFS2_SORT_FRAGMENTS to Kconfig
Move the symbol SYS_JFFS2_SORT_FRAGMENTS to Kconfig and use the only
remaining part of doc/README.JFFS2 that is still relevant and useful to
the help for this option.
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | doc/README.JFFS2 | 30 | ||||
| -rw-r--r-- | fs/jffs2/Kconfig | 12 |
2 files changed, 12 insertions, 30 deletions
diff --git a/doc/README.JFFS2 b/doc/README.JFFS2 deleted file mode 100644 index fddefb1746..0000000000 --- a/doc/README.JFFS2 +++ /dev/null @@ -1,30 +0,0 @@ -JFFS2 options and usage. ------------------------ - -JFFS2 in U-Boot is a read only implementation of the file system in -Linux with the same name. To use JFFS2 define CONFIG_CMD_JFFS2. - -The module adds three new commands. -fsload - load binary file from a file system image -fsinfo - print information about file systems -ls - list files in a directory -chpart - change active partition - -If you do now need the commands, you can enable the filesystem separately -with CONFIG_FS_JFFS2 and call the jffs2 functions yourself. - -If you boot from a partition which is mounted writable, and you -update your boot environment by replacing single files on that -partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. Scanning -the JFFS2 filesystem takes *much* longer with this feature, though. -Sorting is done while inserting into the fragment list, which is -more or less a bubble sort. That algorithm is known to be O(n^2), -thus you should really consider if you can avoid it! - ---- - -TODO. - - Remove the assumption that JFFS can dereference a pointer - into the disk. The current code do not work with memory holes - or hardware with a sliding window (PCMCIA). diff --git a/fs/jffs2/Kconfig b/fs/jffs2/Kconfig index 0e79c34090..3bf01cd031 100644 --- a/fs/jffs2/Kconfig +++ b/fs/jffs2/Kconfig @@ -17,3 +17,15 @@ config JFFS2_NAND depends on FS_JFFS2 help Enable support for NAND flash as the backing store for JFFS2. + +config SYS_JFFS2_SORT_FRAGMENTS + bool "Enable JFFS2 sorting of filesystem fragments (SLOW!)" + depends on FS_JFFS2 + help + If you boot from a partition which is mounted writable, and you + update your boot environment by replacing single files on that + partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. + Scanning the JFFS2 filesystem takes *much* longer with this feature, + though. Sorting is done while inserting into the fragment list, + which is more or less a bubble sort. That algorithm is known to be + O(n^2), thus you should really consider if you can avoid it! |