Re: [PATCH 0/5] erofs: basic sub-page compressed data support
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 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(-)
Re: [PATCH 0/5] erofs: basic sub-page compressed data support
On Wed, 6 Dec 2023 17:10:52 +0800 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. > > 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(-) > Reviewed-by: Yue Hu
