https://bugzilla.kernel.org/show_bug.cgi?id=151631 Bug ID: 151631 Summary: "Synchronizing SCSI cache" fails during(and delays) reboot/shutdown Product: IO/Storage Version: 2.5 Kernel Version: <=4.7.0-g0cbbc42 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: SCSI Assignee: linux-scsi@xxxxxxxxxxxxxxx Reporter: icanrealizeum+bugzillakernelorg@xxxxxxxxx Regression: No During reboot/shutdown, here's a screenshot with the errors: https://i.imgur.com/3P7ztlj.png I'm assuming the ohci-pci errors are unrelated, otherwise, the error is(manually written here): sd 3:0:0:0: [sda] Synchronizing SCSI cache ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x40d0000 action 0x6 frozen ata4.00: SError: { PHYRdyChg CommWake 10B8B DevExch } ata4.00: failed command: FLUSH CACHE EXT ata4.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 22 res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) ata4.00: status { DRDY } ata4: hard resetting link ata4: softreset failed (1st FIS failed) ata4: hard resetting link ... After 2 minutes or so, the reboot/shutdown continues okay. I've tried hdparm -F /dev/sda and hdparm -f /dev/sda during normal system function, they both seem to work as there are no errors reported on console/dmesg/journalctl. This seems to tell me that Synchronizing SCSI cache should work too, unless who knows why they aren't working?maybe something shutdown some laptop parts(like the SSD itself) before reaching that. Some info about what ata4 is: [ 4.728132] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 4.730133] ata4.00: supports DRM functions and may not be fully accessible [ 4.730603] ata4.00: NCQ Send/Recv Log not supported [ 4.730606] ata4.00: ATA-9: Samsung SSD 840 EVO 1TB, EXT0BB6Q, max UDMA/133 [ 4.730609] ata4.00: 1953525168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA [ 4.730897] ata4.00: supports DRM functions and may not be fully accessible [ 4.731400] ata4.00: NCQ Send/Recv Log not supported [ 4.731408] ata4.00: configured for UDMA/133 [ 4.733053] scsi 3:0:0:0: Direct-Access ATA Samsung SSD 840 BB6Q PQ: 0 ANSI: 5 Note this might've worked before so this is a regression(or I just didn't see or have these errors turned on?) with kernel: 4.7.0-rc6-ga99cde4 But with both kernels I am/was experiencing the "Unmounting /oldroot" stalling/delay which is here: https://bugzilla.kernel.org/show_bug.cgi?id=151621 but that message happens before(and it's systemd calling umount2 syscall) this issue you're reading now. file: drivers/scsi/sd.c in function: sd_shutdown hangs in call: sd_sync_cache(sdkp); Cheers -- You are receiving this mail because: You are the assignee for the bug. -- 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
