Add fix-stack branch

diff --git a/.topdeps b/.topdeps
new file mode 100644 (file)
index 0000000..1f7391f
--- /dev/null
+++ b/.topdeps
@@ -0,0 +1 @@
+master

diff --git a/.topmsg b/.topmsg
new file mode 100644 (file)
index 0000000..1f266e5
--- /dev/null
+++ b/.topmsg
@@ -0,0 +1,8 @@
+From: Brian Behlendorf <behlendorf1@llnl.gov>
+Subject: [PATCH] fix stack size
+
+Reduce stack usage
+
+Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
+
+---

diff --git a/zfs/lib/libzpool/dbuf.c b/zfs/lib/libzpool/dbuf.c
index 08d17fb586d25f013d65bff7aaa57f69b98178b2..86502e929b2d645d971253466d92db28d62df29d 100644 (file)
--- a/zfs/lib/libzpool/dbuf.c
+++ b/zfs/lib/libzpool/dbuf.c
@@ -1828,7 +1828,11 @@ dbuf_check_blkptr(dnode_t *dn, dmu_buf_impl_t *db)
        }
 }
 
-static void
+/* dbuf_sync_indirect() is called recursively from dbuf_sync_list() so it
+ * is critical the we not allow the compiler to inline this function in to
+ * dbuf_sync_list() thereby drastically bloating the stack usage.
+ */
+noinline static void
 dbuf_sync_indirect(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
 {
        dmu_buf_impl_t *db = dr->dr_dbuf;
@@ -1875,7 +1879,11 @@ dbuf_sync_indirect(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
        zio_nowait(zio);
 }
 
-static void
+/* dbuf_sync_leaf() is called recursively from dbuf_sync_list() so it is
+ * critical the we not allow the compiler to inline this function in to
+ * dbuf_sync_list() thereby drastically bloating the stack usage.
+ */
+noinline static void
 dbuf_sync_leaf(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
 {
        arc_buf_t **datap = &dr->dt.dl.dr_data;