Gao Xiang 6422cde1b0 erofs: use buffered I/O for file-backed mounts by default ... For many use cases (e.g. container images are just fetched from remote), performance will be impacted if underlay page cache is up-to-date but direct i/o flushes dirty pages first. Instead, let's use buffered I/O by default to keep in sync with loop devices and add a (re)mount option to explicitly give a try to use direct I/O if supported by the underlying files. The container startup time is improved as below: [workload] docker.io/library/workpress:latest unpack 1st run non-1st runs EROFS snapshotter buffered I/O file 4.586404265s 0.308s 0.198s EROFS snapshotter direct I/O file 4.581742849s 2.238s 0.222s EROFS snapshotter loop 4.596023152s 0.346s 0.201s Overlayfs snapshotter 5.382851037s 0.206s 0.214s Fixes: fb17675026 ("erofs: add file-backed mount support") Cc: Derek McGowan <derek@mcg.dev> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Link: https://lore.kernel.org/r/20241212134336.2059899-1-hsiangkao@linux.alibaba.com		2024-12-16 21:02:07 +08:00
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compress.h	erofs: avoid refcounting short-lived pages	2024-07-11 15:14:26 +08:00
data.c	erofs: reference struct erofs_device_info for erofs_map_dev	2024-12-16 21:02:06 +08:00
decompressor_deflate.c	erofs: tidy up stream decompressors	2024-07-09 19:04:41 +08:00
decompressor_lzma.c	erofs: convert comma to semicolon	2024-07-26 18:48:12 +08:00
decompressor_zstd.c	erofs: tidy up stream decompressors	2024-07-09 19:04:41 +08:00
decompressor.c	erofs: fix error handling in z_erofs_init_decompressor	2024-09-10 00:46:34 +08:00
dir.c	erofs: simplify readdir operation	2024-08-19 11:06:20 +08:00
erofs_fs.h	erofs: restrict pcluster size limitations	2024-09-12 23:00:09 +08:00
fileio.c	erofs: use buffered I/O for file-backed mounts by default	2024-12-16 21:02:07 +08:00
fscache.c	erofs: reference struct erofs_device_info for erofs_map_dev	2024-12-16 21:02:06 +08:00
inode.c	erofs: clarify direct I/O support	2024-11-18 18:50:14 +08:00
internal.h	erofs: use buffered I/O for file-backed mounts by default	2024-12-16 21:02:07 +08:00
Kconfig	erofs: mark experimental fscache backend deprecated	2024-09-10 15:27:11 +08:00
Makefile	erofs: support unencoded inodes for fileio	2024-09-10 15:26:36 +08:00
namei.c	erofs_buf: store address_space instead of inode	2024-04-25 00:57:14 -04:00
super.c	erofs: use buffered I/O for file-backed mounts by default	2024-12-16 21:02:07 +08:00
sysfs.c	erofs: add sysfs node to drop internal caches	2024-11-18 18:50:13 +08:00
xattr.c	erofs_buf: store address_space instead of inode	2024-04-25 00:57:14 -04:00
xattr.h	erofs: move erofs_xattr_handlers and xattr_handler_map to .rodata	2023-10-09 16:24:17 +02:00
zdata.c	erofs: fix PSI memstall accounting	2024-12-13 00:24:40 +08:00
zmap.c	erofs: handle NONHEAD !delta[1] lclusters gracefully	2024-11-18 18:50:14 +08:00
zutil.c	erofs: fix rare pcluster memory leak after unmounting	2024-12-13 00:24:12 +08:00