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| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2021-08-05 03:36:00 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2021-08-09 19:14:59 +0300 |
| commit | 06252e9ce05b94b587e522667b85848a30197b15 (patch) | |
| tree | 1c46bf38cff515dea5bc1399d3f6557986076b4e /Documentation/filesystems | |
| parent | a08e67a0280215f74eccf14fda81dd7fed6596ba (diff) | |
| download | linux-06252e9ce05b94b587e522667b85848a30197b15.tar.xz | |
erofs: dax support for non-tailpacking regular file
DAX is quite useful for some VM use cases in order to save guest
memory extremely with minimal lightweight EROFS.
In order to prepare for such use cases, add preliminary dax support
for non-tailpacking regular files for now.
Tested with the DRAM-emulated PMEM and the EROFS image generated by
"mkfs.erofs -Enoinline_data enwik9.fsdax.img enwik9"
Link: https://lore.kernel.org/r/20210805003601.183063-3-hsiangkao@linux.alibaba.com
Cc: nvdimm@lists.linux.dev
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/erofs.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/filesystems/erofs.rst b/Documentation/filesystems/erofs.rst index 832839fcf4c3..868e3972227f 100644 --- a/Documentation/filesystems/erofs.rst +++ b/Documentation/filesystems/erofs.rst @@ -84,6 +84,9 @@ cache_strategy=%s Select a strategy for cached decompression from now on: It still does in-place I/O decompression for the rest compressed physical clusters. ========== ============================================= +dax={always,never} Use direct access (no page cache). See + Documentation/filesystems/dax.rst. +dax A legacy option which is an alias for ``dax=always``. =================== ========================================================= On-disk details |