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authorHarshad Shirwadkar <harshadshirwadkar@gmail.com>2020-10-15 23:37:57 +0300
committerTheodore Ts'o <tytso@mit.edu>2020-10-22 06:22:37 +0300
commitaa75f4d3daaeb1389b9cce9d6b84401eaf228d4e (patch)
tree3d5eb0850ad9dfdb894ed737c764520a80cea0fc /include/trace
parentff780b91efe901b8eecd8114785abae5341820ad (diff)
downloadlinux-aa75f4d3daaeb1389b9cce9d6b84401eaf228d4e.tar.xz
ext4: main fast-commit commit path
This patch adds main fast commit commit path handlers. The overall patch can be divided into two inter-related parts: (A) Metadata updates tracking This part consists of helper functions to track changes that need to be committed during a commit operation. These updates are maintained by Ext4 in different in-memory queues. Following are the APIs and their short description that are implemented in this patch: - ext4_fc_track_link/unlink/creat() - Track unlink. link and creat operations - ext4_fc_track_range() - Track changed logical block offsets inodes - ext4_fc_track_inode() - Track inodes - ext4_fc_mark_ineligible() - Mark file system fast commit ineligible() - ext4_fc_start_update() / ext4_fc_stop_update() / ext4_fc_start_ineligible() / ext4_fc_stop_ineligible() These functions are useful for co-ordinating inode updates with commits. (B) Main commit Path This part consists of functions to convert updates tracked in in-memory data structures into on-disk commits. Function ext4_fc_commit() is the main entry point to commit path. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com> Link: https://lore.kernel.org/r/20201015203802.3597742-6-harshadshirwadkar@gmail.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/ext4.h172
1 files changed, 172 insertions, 0 deletions
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 4c8b99ec8606..521de3a82118 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -95,6 +95,16 @@ TRACE_DEFINE_ENUM(ES_REFERENCED_B);
{ FALLOC_FL_COLLAPSE_RANGE, "COLLAPSE_RANGE"}, \
{ FALLOC_FL_ZERO_RANGE, "ZERO_RANGE"})
+#define show_fc_reason(reason) \
+ __print_symbolic(reason, \
+ { EXT4_FC_REASON_XATTR, "XATTR"}, \
+ { EXT4_FC_REASON_CROSS_RENAME, "CROSS_RENAME"}, \
+ { EXT4_FC_REASON_JOURNAL_FLAG_CHANGE, "JOURNAL_FLAG_CHANGE"}, \
+ { EXT4_FC_REASON_MEM, "NO_MEM"}, \
+ { EXT4_FC_REASON_SWAP_BOOT, "SWAP_BOOT"}, \
+ { EXT4_FC_REASON_RESIZE, "RESIZE"}, \
+ { EXT4_FC_REASON_RENAME_DIR, "RENAME_DIR"}, \
+ { EXT4_FC_REASON_FALLOC_RANGE, "FALLOC_RANGE"})
TRACE_EVENT(ext4_other_inode_update_time,
TP_PROTO(struct inode *inode, ino_t orig_ino),
@@ -2791,6 +2801,168 @@ TRACE_EVENT(ext4_lazy_itable_init,
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->group)
);
+TRACE_EVENT(ext4_fc_commit_start,
+ TP_PROTO(struct super_block *sb),
+
+ TP_ARGS(sb),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sb->s_dev;
+ ),
+
+ TP_printk("fast_commit started on dev %d,%d",
+ MAJOR(__entry->dev), MINOR(__entry->dev))
+);
+
+TRACE_EVENT(ext4_fc_commit_stop,
+ TP_PROTO(struct super_block *sb, int nblks, int reason),
+
+ TP_ARGS(sb, nblks, reason),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(int, nblks)
+ __field(int, reason)
+ __field(int, num_fc)
+ __field(int, num_fc_ineligible)
+ __field(int, nblks_agg)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sb->s_dev;
+ __entry->nblks = nblks;
+ __entry->reason = reason;
+ __entry->num_fc = EXT4_SB(sb)->s_fc_stats.fc_num_commits;
+ __entry->num_fc_ineligible =
+ EXT4_SB(sb)->s_fc_stats.fc_ineligible_commits;
+ __entry->nblks_agg = EXT4_SB(sb)->s_fc_stats.fc_numblks;
+ ),
+
+ TP_printk("fc on [%d,%d] nblks %d, reason %d, fc = %d, ineligible = %d, agg_nblks %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->nblks, __entry->reason, __entry->num_fc,
+ __entry->num_fc_ineligible, __entry->nblks_agg)
+);
+
+#define FC_REASON_NAME_STAT(reason) \
+ show_fc_reason(reason), \
+ __entry->sbi->s_fc_stats.fc_ineligible_reason_count[reason]
+
+TRACE_EVENT(ext4_fc_stats,
+ TP_PROTO(struct super_block *sb),
+
+ TP_ARGS(sb),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(struct ext4_sb_info *, sbi)
+ __field(int, count)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sb->s_dev;
+ __entry->sbi = EXT4_SB(sb);
+ ),
+
+ TP_printk("dev %d:%d fc ineligible reasons:\n"
+ "%s:%d, %s:%d, %s:%d, %s:%d, %s:%d, %s:%d, %s:%d, %s,%d; "
+ "num_commits:%ld, ineligible: %ld, numblks: %ld",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_XATTR),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_CROSS_RENAME),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_JOURNAL_FLAG_CHANGE),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_MEM),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_SWAP_BOOT),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_RESIZE),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_RENAME_DIR),
+ FC_REASON_NAME_STAT(EXT4_FC_REASON_FALLOC_RANGE),
+ __entry->sbi->s_fc_stats.fc_num_commits,
+ __entry->sbi->s_fc_stats.fc_ineligible_commits,
+ __entry->sbi->s_fc_stats.fc_numblks)
+
+);
+
+#define DEFINE_TRACE_DENTRY_EVENT(__type) \
+ TRACE_EVENT(ext4_fc_track_##__type, \
+ TP_PROTO(struct inode *inode, struct dentry *dentry, int ret), \
+ \
+ TP_ARGS(inode, dentry, ret), \
+ \
+ TP_STRUCT__entry( \
+ __field(dev_t, dev) \
+ __field(int, ino) \
+ __field(int, error) \
+ ), \
+ \
+ TP_fast_assign( \
+ __entry->dev = inode->i_sb->s_dev; \
+ __entry->ino = inode->i_ino; \
+ __entry->error = ret; \
+ ), \
+ \
+ TP_printk("dev %d:%d, inode %d, error %d, fc_%s", \
+ MAJOR(__entry->dev), MINOR(__entry->dev), \
+ __entry->ino, __entry->error, \
+ #__type) \
+ )
+
+DEFINE_TRACE_DENTRY_EVENT(create);
+DEFINE_TRACE_DENTRY_EVENT(link);
+DEFINE_TRACE_DENTRY_EVENT(unlink);
+
+TRACE_EVENT(ext4_fc_track_inode,
+ TP_PROTO(struct inode *inode, int ret),
+
+ TP_ARGS(inode, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(int, ino)
+ __field(int, error)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->error = ret;
+ ),
+
+ TP_printk("dev %d:%d, inode %d, error %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->ino, __entry->error)
+ );
+
+TRACE_EVENT(ext4_fc_track_range,
+ TP_PROTO(struct inode *inode, long start, long end, int ret),
+
+ TP_ARGS(inode, start, end, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(int, ino)
+ __field(long, start)
+ __field(long, end)
+ __field(int, error)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->start = start;
+ __entry->end = end;
+ __entry->error = ret;
+ ),
+
+ TP_printk("dev %d:%d, inode %d, error %d, start %ld, end %ld",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->ino, __entry->error, __entry->start,
+ __entry->end)
+ );
+
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */