On 7/13/21 12:45 PM, Bean Huo wrote:
This change only impacts on the Samsung exynos platform. and Can's
optimization patch is to optimise the host_lock,, and removed
host_lock, now add back in this function makes sense to me.
but I am thinking how about hba->host_sem?
Hi Bean,
Calls of exynos_ufs_specify_nexus_t_xfer_req() must be serialized, hence
Jaegeuks' patch. This function is called from the I/O submission path so
performance matters. My understanding is that spinlocks have less
overhead than semaphores. Hence the choice for a spinlock.
Thanks,
Bart.
