> > On 11/3/25 11:07, Stephen Hemminger wrote: > > On Mon, 3 Nov 2025 09:12:39 -0600 > > Wathsala Vithanage <[email protected]> wrote: > > > >> MCS lock is broken, it's just a matter of time it will run into a deadlock. > >> > >> drivers/dma/cnxk is a user of MCS lock. > > I am surprised that a driver would use mcslock. > > MCSlock is targeted at case of large number of CPU's with lots of > > contention. > > It will likely be slower than spinlock or ticketlock for the use case of > > driver. > It appears in |drivers/dma/cnxk/cnxk_dmadev_fp.c|, perhaps the > maintainer can clarify. >
If MCS lock is really broken, it needs to be fixed anyway. It might be used by other third-party libs/apps that do use on DPDK.
