diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2022-11-28 17:24:36 -0800 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2022-11-28 17:54:49 -0800 |
| commit | 254e3459285cbf2174350bbc0051e475e1bc5196 (patch) | |
| tree | b67e276af1fbba40cfc3c62803e60aa7a42bdb06 /fs/xfs/xfs_trace.h | |
| parent | c2beff99eb03866df6fdbd3a93b08fd27eb8bf5c (diff) | |
| download | lwn-254e3459285cbf2174350bbc0051e475e1bc5196.tar.gz lwn-254e3459285cbf2174350bbc0051e475e1bc5196.zip | |
xfs: add debug knob to slow down write for fun
Add a new error injection knob so that we can arbitrarily slow down
pagecache writes to test for race conditions and aberrant reclaim
behavior if the writeback mechanisms are slow to issue writeback. This
will enable functional testing for the ifork sequence counters
introduced in commit 304a68b9c63b ("xfs: use iomap_valid method to
detect stale cached iomaps") that fixes write racing with reclaim
writeback.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_trace.h')
| -rw-r--r-- | fs/xfs/xfs_trace.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index c9ada9577a4a..421d1e504ac4 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -3396,6 +3396,48 @@ DEFINE_EVENT(xfs_wb_invalid_class, name, \ DEFINE_WB_INVALID_EVENT(xfs_wb_cow_iomap_invalid); DEFINE_WB_INVALID_EVENT(xfs_wb_data_iomap_invalid); +DECLARE_EVENT_CLASS(xfs_iomap_invalid_class, + TP_PROTO(struct xfs_inode *ip, const struct iomap *iomap), + TP_ARGS(ip, iomap), + TP_STRUCT__entry( + __field(dev_t, dev) + __field(xfs_ino_t, ino) + __field(u64, addr) + __field(loff_t, pos) + __field(u64, len) + __field(u64, validity_cookie) + __field(u64, inodeseq) + __field(u16, type) + __field(u16, flags) + ), + TP_fast_assign( + __entry->dev = VFS_I(ip)->i_sb->s_dev; + __entry->ino = ip->i_ino; + __entry->addr = iomap->addr; + __entry->pos = iomap->offset; + __entry->len = iomap->length; + __entry->validity_cookie = iomap->validity_cookie; + __entry->type = iomap->type; + __entry->flags = iomap->flags; + __entry->inodeseq = xfs_iomap_inode_sequence(ip, iomap->flags); + ), + TP_printk("dev %d:%d ino 0x%llx pos 0x%llx addr 0x%llx bytecount 0x%llx type 0x%x flags 0x%x validity_cookie 0x%llx inodeseq 0x%llx", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->ino, + __entry->pos, + __entry->addr, + __entry->len, + __entry->type, + __entry->flags, + __entry->validity_cookie, + __entry->inodeseq) +); +#define DEFINE_IOMAP_INVALID_EVENT(name) \ +DEFINE_EVENT(xfs_iomap_invalid_class, name, \ + TP_PROTO(struct xfs_inode *ip, const struct iomap *iomap), \ + TP_ARGS(ip, iomap)) +DEFINE_IOMAP_INVALID_EVENT(xfs_iomap_invalid); + /* refcount/reflink tracepoint definitions */ /* reflink tracepoints */ |