diff mbox series

[net-next,V4,05/11] net/mlx5: fs, retry insertion to hash table on EBUSY

Message ID 20241219175841.1094544-6-tariqt@nvidia.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series mlx5 misc changes 2024-12-19 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: linux-rdma@vger.kernel.org
netdev/build_clang success Errors and warnings before: 1 this patch: 1
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 18 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Tariq Toukan Dec. 19, 2024, 5:58 p.m. UTC 
From: Mark Bloch <mbloch@nvidia.com>

When inserting into an rhashtable faster than it can grow, an -EBUSY error
may be encountered. Modify the insertion logic to retry on -EBUSY until
either a successful insertion or a genuine error is returned.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index f781f8f169b9..ae1a5705b26d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -821,11 +821,17 @@  static int insert_fte(struct mlx5_flow_group *fg, struct fs_fte *fte)
 		return index;
 
 	fte->index = index + fg->start_index;
+retry_insert:
 	ret = rhashtable_insert_fast(&fg->ftes_hash,
 				     &fte->hash,
 				     rhash_fte);
-	if (ret)
+	if (ret) {
+		if (ret == -EBUSY) {
+			cond_resched();
+			goto retry_insert;
+		}
 		goto err_ida_remove;
+	}
 
 	tree_add_node(&fte->node, &fg->node);
 	list_add_tail(&fte->node.list, &fg->node.children);