On Wed, Jan 24, 2024 at 11:01 AM Martin K. Petersen <martin.petersen@xxxxxxxxxx> wrote: > > On Fri, 12 Jan 2024 15:00:00 +0800, Ming Lei wrote: > > > Inside scsi_eh_wakeup(), scsi_host_busy() is called & checked with host lock > > every time for deciding if error handler kthread needs to be waken up. > > > > This way can be too heavy in case of recovery, such as: > > > > - N hardware queues > > - queue depth is M for each hardware queue > > - each scsi_host_busy() iterates over (N * M) tag/requests > > > > [...] > > Applied to 6.8/scsi-fixes, thanks! > > [1/1] scsi: core: move scsi_host_busy() out of host lock for waking up EH handler > https://git.kernel.org/mkp/scsi/c/4373534a9850 Hi Martin, When I started to backport this commit, I found it was merged as wrong, the point is that scsi_host_busy() needs to be moved out of host lock. I will send one new patch to fix it. Thanks, Ming
