On 2023/12/6 17:10, Gao Xiang wrote:
> Hi folks,
>
> Recently, there are two new cases so that we need to add a preliminary
> sub-page block support for compressed files;
>
> - As Android folks requested, Android ecosystem itself is now switching
> to 16k page size for their arm64 devices. They needs an option of
> 4k-block image compatibility on their new 16k devices;
>
> - Some arm64 cloud servers use 64k page size for their optimized
> workloads, but 4k-block EROFS container images need to be parsed too.
>
> So this patchset mainly addresses the requirements above with a very
> very simple approach as a start: just allocate short-lived temporary
> buffers all the time to keep compressed data if sub-page blocks are
> identified. In other words, no inplace/cache decompression for
> the preliminary support.
>
> This patchset survives EROFS stress test on my own testfarms.
Looks good to me, feel free to add:
Reviewed-by: Chao Yu <chao@kernel.org>
Thanks,
>
> Thanks,
> Gao Xiang
>
> Gao Xiang (5):
> erofs: support I/O submission for sub-page compressed blocks
> erofs: record `pclustersize` in bytes instead of pages
> erofs: fix up compacted indexes for block size < 4096
> erofs: refine z_erofs_transform_plain() for sub-page block support
> erofs: enable sub-page compressed block support
>
> fs/erofs/decompressor.c | 81 +++++++++------
> fs/erofs/inode.c | 6 +-
> fs/erofs/zdata.c | 224 ++++++++++++++++++----------------------
> fs/erofs/zmap.c | 32 +++---
> 4 files changed, 169 insertions(+), 174 deletions(-)
>