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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-22 23:29:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-22 23:29:39 +0300
commitfe6f0ed0dac7df01014ef17fdad45e3eaf21b949 (patch)
tree684682eaf0ed4dffafab89cf4ad26079d6730d1b /Documentation
parent6faf05c2b2b4fe70d9068067437649401531de0a (diff)
parent6aa58d8ad20a3323f42274c25820a6f54192422d (diff)
downloadlinux-fe6f0ed0dac7df01014ef17fdad45e3eaf21b949.tar.xz
Merge tag 'f2fs-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs updates from Jaegeuk Kim: "In this round, we've tuned f2fs to improve general performance by serializing block allocation and enhancing discard flows like fstrim which avoids user IO contention. And we've added fsync_mode=nobarrier which gives an option to user where it skips issuing cache_flush commands to underlying flash storage. And there are many bug fixes related to fuzzed images, revoked atomic writes, quota ops, and minor direct IO. Enhancements: - add fsync_mode=nobarrier which bypasses cache_flush command - enhance the discarding flow which avoids user IOs and issues in LBA order - readahead some encrypted blocks during GC - enable in-memory inode checksum to verify the blocks if F2FS_CHECK_FS is set - enhance nat_bits behavior - set -o discard by default - set REQ_RAHEAD to bio in ->readpages Bug fixes: - fix a corner case to corrupt atomic_writes revoking flow - revisit i_gc_rwsem to fix race conditions - fix some dio behaviors captured by xfstests - correct handling errors given by quota-related failures - add many sanity check flows to avoid fuzz test failures - add more error number propagation to their callers - fix several corner cases to continue fault injection w/ shutdown loop" * tag 'f2fs-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (89 commits) f2fs: readahead encrypted block during GC f2fs: avoid fi->i_gc_rwsem[WRITE] lock in f2fs_gc f2fs: fix performance issue observed with multi-thread sequential read f2fs: fix to skip verifying block address for non-regular inode f2fs: rework fault injection handling to avoid a warning f2fs: support fault_type mount option f2fs: fix to return success when trimming meta area f2fs: fix use-after-free of dicard command entry f2fs: support discard submission error injection f2fs: split discard command in prior to block layer f2fs: wake up gc thread immediately when gc_urgent is set f2fs: fix incorrect range->len in f2fs_trim_fs() f2fs: refresh recent accessed nat entry in lru list f2fs: fix avoid race between truncate and background GC f2fs: avoid race between zero_range and background GC f2fs: fix to do sanity check with block address in main area v2 f2fs: fix to do sanity check with inline flags f2fs: fix to reset i_gc_failures correctly f2fs: fix invalid memory access f2fs: fix to avoid broken of dnode block list ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-fs-f2fs8
-rw-r--r--Documentation/filesystems/f2fs.txt18
2 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 9b0123388f18..94a24aedcdb2 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -51,6 +51,14 @@ Description:
Controls the dirty page count condition for the in-place-update
policies.
+What: /sys/fs/f2fs/<disk>/min_seq_blocks
+Date: August 2018
+Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
+Description:
+ Controls the dirty page count condition for batched sequential
+ writes in ->writepages.
+
+
What: /sys/fs/f2fs/<disk>/min_hot_blocks
Date: March 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index 69f8de995739..e5edd29687b5 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -157,6 +157,24 @@ data_flush Enable data flushing before checkpoint in order to
persist data of regular and symlink.
fault_injection=%d Enable fault injection in all supported types with
specified injection rate.
+fault_type=%d Support configuring fault injection type, should be
+ enabled with fault_injection option, fault type value
+ is shown below, it supports single or combined type.
+ Type_Name Type_Value
+ FAULT_KMALLOC 0x000000001
+ FAULT_KVMALLOC 0x000000002
+ FAULT_PAGE_ALLOC 0x000000004
+ FAULT_PAGE_GET 0x000000008
+ FAULT_ALLOC_BIO 0x000000010
+ FAULT_ALLOC_NID 0x000000020
+ FAULT_ORPHAN 0x000000040
+ FAULT_BLOCK 0x000000080
+ FAULT_DIR_DEPTH 0x000000100
+ FAULT_EVICT_INODE 0x000000200
+ FAULT_TRUNCATE 0x000000400
+ FAULT_IO 0x000000800
+ FAULT_CHECKPOINT 0x000001000
+ FAULT_DISCARD 0x000002000
mode=%s Control block allocation mode which supports "adaptive"
and "lfs". In "lfs" mode, there should be no random
writes towards main area.