Hello Ziyang,
On Sat, May 14, 2022 at 11:57 AM Ziyang Xuan
<william.xuanziyang@xxxxxxxxxx> wrote:
t7xx_cldma_clear_rxq() call t7xx_cldma_alloc_and_map_skb() in spin_lockWould not it will be more reliable to just rework
context, But __dev_alloc_skb() in t7xx_cldma_alloc_and_map_skb() uses
GFP_KERNEL, that will introduce scheduling factor in spin_lock context.
Replace GFP_KERNEL with GFP_ATOMIC to fix it.
t7xx_cldma_clear_rxq() to avoid calling t7xx_cldma_alloc_and_map_skb()
under the spin lock instead of doing each allocation with GFP_ATOMIC?
E.g. t7xx_cldma_gpd_rx_from_q() calls t7xx_cldma_alloc_and_map_skb()
avoiding any lock holding.