diff options
| author |   Christoph Hellwig <hch@lst.de> | 2025-03-10 14:19:15 +0100 |
|---|---|---|
| committer |   Carlos Maiolino <cem@kernel.org> | 2025-03-10 14:29:44 +0100 |
| commit | 89ce287c83c91f5d222809b82e597426587a862d (patch) | |
| tree | 115b59274cd822d83b02079eea45cd238b9e2f13 | |
| parent | xfs: cleanup mapping tmpfs folios into the buffer cache (diff) | |
| download | wireguard-linux-89ce287c83c91f5d222809b82e597426587a862d.tar.xz wireguard-linux-89ce287c83c91f5d222809b82e597426587a862d.zip | |
xfs: trace what memory backs a buffer
Add three trace points for the different backing memory allocators for
buffers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | fs/xfs/xfs_buf.c | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index a7430fcd8301..106ee81fa56f 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -240,6 +240,7 @@ xfs_buf_alloc_kmem( return -ENOMEM; } bp->b_flags |= _XBF_KMEM; + trace_xfs_buf_backing_kmem(bp, _RET_IP_); return 0; } @@ -319,9 +320,11 @@ xfs_buf_alloc_backing_mem( if (!folio) { if (size <= PAGE_SIZE) return -ENOMEM; + trace_xfs_buf_backing_fallback(bp, _RET_IP_); goto fallback; } bp->b_addr = folio_address(folio); + trace_xfs_buf_backing_folio(bp, _RET_IP_); return 0; fallback: @@ -335,6 +338,7 @@ fallback: memalloc_retry_wait(gfp_mask); } + trace_xfs_buf_backing_vmalloc(bp, _RET_IP_); return 0; } diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 83f894c07866..e56ba1963160 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -692,6 +692,10 @@ DEFINE_BUF_EVENT(xfs_buf_iodone_async); DEFINE_BUF_EVENT(xfs_buf_error_relse); DEFINE_BUF_EVENT(xfs_buf_drain_buftarg); DEFINE_BUF_EVENT(xfs_trans_read_buf_shut); +DEFINE_BUF_EVENT(xfs_buf_backing_folio); +DEFINE_BUF_EVENT(xfs_buf_backing_kmem); +DEFINE_BUF_EVENT(xfs_buf_backing_vmalloc); +DEFINE_BUF_EVENT(xfs_buf_backing_fallback); /* not really buffer traces, but the buf provides useful information */ DEFINE_BUF_EVENT(xfs_btree_corrupt); |