From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Thu, 12 Jun 2025 22:26:48 +0000 (-0400)
Subject: bcachefs: trace_extent_trim_atomic
X-Git-Tag: v6.16-rc4~24^2~50
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0f4dd2ce352d38c7ecf1b3821c908816eb6376a7;p=thirdparty%2Flinux.git

bcachefs: trace_extent_trim_atomic

Add a tracepoint for when we insert only part of an extent, due to too
many overwrites.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/extent_update.c b/fs/bcachefs/extent_update.c
index b899ee75f5b9..e76e58a568bf 100644
--- a/fs/bcachefs/extent_update.c
+++ b/fs/bcachefs/extent_update.c
@@ -139,6 +139,17 @@ int bch2_extent_trim_atomic(struct btree_trans *trans,
 	if (ret)
 		return ret;
 
-	bch2_cut_back(end, k);
+	/* tracepoint */
+
+	if (bpos_lt(end, k->k.p)) {
+		if (trace_extent_trim_atomic_enabled()) {
+			CLASS(printbuf, buf)();
+			bch2_bpos_to_text(&buf, end);
+			prt_newline(&buf);
+			bch2_bkey_val_to_text(&buf, trans->c, bkey_i_to_s_c(k));
+			trace_extent_trim_atomic(trans->c, buf.buf);
+		}
+		bch2_cut_back(end, k);
+	}
 	return 0;
 }
diff --git a/fs/bcachefs/trace.h b/fs/bcachefs/trace.h
index dc09532796af..41efebdd06ef 100644
--- a/fs/bcachefs/trace.h
+++ b/fs/bcachefs/trace.h
@@ -1490,6 +1490,11 @@ DEFINE_EVENT(fs_str, io_move_evacuate_bucket,
 	TP_ARGS(c, str)
 );
 
+DEFINE_EVENT(fs_str, extent_trim_atomic,
+	TP_PROTO(struct bch_fs *c, const char *str),
+	TP_ARGS(c, str)
+);
+
 #ifdef CONFIG_BCACHEFS_PATH_TRACEPOINTS
 
 TRACE_EVENT(update_by_path,