Hello, This patch is to avoid indefinite command retry loop. The previous RFC patch is here: http://marc.info/?t=137690537600002&r=1&w=3 In the previous discuss, James says that once retry loop is detected, whether or not to panic(offline) should be decided by user, and not in scsi subsystem. So we need a way to detect retry loop and report it to user space. This patch adds printk to detect command retry loop in user space. When the command retry count exceeds the allowed count(scmd->allowed), the kernel prints messages, which can be handled in user space application. Here the allowed count(scmd->allowed) is currently used as finite retry limit count. Once retry count exceeds the allowed count on a device, the message is suppressed on the device to avoid too much messages outputted in dmesg. --- Eiichi Tsukata (1): scsi: Add printk to detect retry loop drivers/scsi/scsi_error.c | 3 +-- drivers/scsi/scsi_lib.c | 14 ++++++++++++++ include/scsi/scsi_device.h | 1 + 3 files changed, 16 insertions(+), 2 deletions(-) -- Eiichi Tsukata Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: eiichi.tsukata.xh@xxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
