From 0102c8c7fdfc4bd700971daff2b94470f4eafae4 Mon Sep 17 00:00:00 2001 From: Dapeng Mi Date: Thu, 17 Sep 2026 09:52:33 +0800 Subject: perf/x86/intel: Rename DMR offcore_rsp attribute to offmodule_rsp DMR introduces Offmodule Response events in place of the legacy Offcore Response events, but it still exposes the inherited offcore_rsp PMU attribute for programming the corresponding MSR data. Rename the DMR PMU attribute to offmodule_rsp so the sysfs interface matches the underlying event name and avoids user & tooling confusion. Signed-off-by: Dapeng Mi Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Link: https://patch.msgid.link/20260917015234.981153-12-dapeng1.mi@linux.intel.com --- Documentation/ABI/testing/sysfs-fs-erofs | 49 ++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-fs-erofs (limited to 'Documentation/ABI/testing/sysfs-fs-erofs') diff --git a/Documentation/ABI/testing/sysfs-fs-erofs b/Documentation/ABI/testing/sysfs-fs-erofs new file mode 100644 index 000000000..0b8b4354e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-fs-erofs @@ -0,0 +1,49 @@ +What: /sys/fs/erofs/features/ +Date: November 2021 +Contact: "Huang Jianan" +Description: Shows all enabled kernel features. + Supported features: + compr_cfgs, big_pcluster, chunked_file, device_table, + compr_head2, sb_chksum, ztailpacking, dedupe, fragments, + xattr_prefixes, 48bit, metabox. + +What: /sys/fs/erofs//sync_decompress +Date: November 2021 +Contact: "Huang Jianan" +Description: Control strategy of synchronous decompression. Synchronous + decompression tries to decompress in the reader thread for + synchronous reads and small asynchronous reads (<= 12 KiB): + + - 0 (auto, default): apply to synchronous reads only, but will + switch to 1 (force on) if any decompression + request is detected in atomic contexts; + - 1 (force on): apply to synchronous reads and small + asynchronous reads; + - 2 (force off): disable synchronous decompression completely. + +What: /sys/fs/erofs//drop_caches +Date: November 2024 +Contact: "Guo Chunhai" +Description: Writing to this will drop compression-related caches, + currently used to drop in-memory pclusters and cached + compressed folios: + + - 1 : invalidate cached compressed folios + - 2 : drop in-memory pclusters + - 3 : drop in-memory pclusters and cached compressed folios + +What: /sys/fs/erofs/accel +Date: May 2025 +Contact: "Bo Liu" +Description: Used to set or show hardware accelerators in effect + and multiple accelerators are separated by '\n'. + Supported accelerator(s): qat_deflate. + Disable all accelerators with an empty string (echo > accel). + +What: /sys/fs/erofs//dir_ra_bytes +Date: July 2025 +Contact: "Chao Yu" +Description: Used to set or show readahead bytes during readdir(), by + default the value is 16384. + + - 0: disable readahead. -- cgit v1.3.1