scsi: Implement per-cpu logging buffer

Implement a per-cpu buffer for formatting messages to avoid line breaks
up under high load.  This patch implements scmd_printk() and
sdev_prefix_printk() using the per-cpu buffer and makes sdev_printk() a
wrapper for sdev_prefix_printk().

Tested-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 58158f1..447c2d2 100644 (file)
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -167,7 +167,7 @@ scsi_mod-y                  += scsi_scan.o scsi_sysfs.o scsi_devinfo.o
 scsi_mod-$(CONFIG_SCSI_NETLINK)        += scsi_netlink.o
 scsi_mod-$(CONFIG_SYSCTL)      += scsi_sysctl.o
 scsi_mod-$(CONFIG_SCSI_PROC_FS)        += scsi_proc.o
-scsi_mod-y                     += scsi_trace.o
+scsi_mod-y                     += scsi_trace.o scsi_logging.o
 scsi_mod-$(CONFIG_PM)          += scsi_pm.o
 
 hv_storvsc-y                   := storvsc_drv.o

diff --cc drivers/scsi/scsi_logging.c
Simple merge

diff --cc include/scsi/scsi_device.h
Simple merge