Re: I/O hangs after resuming from suspend-to-ram

Ming Lei
2017-09-20T22:20:29Z

On Mon, Aug 28, 2017 at 03:10:35PM +0200, Martin Steigerwald wrote:
> Ming Lei - 28.08.17, 20:58:
> > On Sun, Aug 27, 2017 at 09:43:52AM +0200, Oleksandr Natalenko wrote:
> > > Hi.
> > >
> > > Here is disk setup for QEMU VM:
> > >
> > > ===
> > > [root@archmq ~]# smartctl -i /dev/sda
> > > …
> > > Device Model: QEMU HARDDISK
> > > Serial Number: QM00001
> > > Firmware Version: 2.5+
> > > User Capacity: 4,294,967,296 bytes [4.29 GB]
> > > Sector Size: 512 bytes logical/physical
> > > Device is: Not in smartctl database [for details use: -P showall]
> > > ATA Version is: ATA/ATAPI-7, ATA/ATAPI-5 published, ANSI NCITS 340-2000
> > > Local Time is: Sun Aug 27 09:31:54 2017 CEST
> > > SMART support is: Available - device has SMART capability.
> > > SMART support is: Enabled
> > >
> > > [root@archmq ~]# lsblk
> > > NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> > > sda 8:0 0 4G 0 disk
> > > `-sda1 8:1 0 4G 0 part
> > >
> > > `-md0 9:0 0 4G 0 raid10
> > >
> > > `-system 253:0 0 4G 0 crypt
> > >
> > > |-system-boot 253:1 0 512M 0 lvm /boot
> > > |-system-swap 253:2 0 512M 0 lvm [SWAP]
> > >
> > > `-system-root 253:3 0 3G 0 lvm /
> > >
> > > sdb 8:16 0 4G 0 disk
> > > `-sdb1 8:17 0 4G 0 part
> > >
> > > `-md0 9:0 0 4G 0 raid10
> > >
> > > `-system 253:0 0 4G 0 crypt
> > >
> > > |-system-boot 253:1 0 512M 0 lvm /boot
> > > |-system-swap 253:2 0 512M 0 lvm [SWAP]
> > >
> > > `-system-root 253:3 0 3G 0 lvm /
> > >
> > > sr0 11:0 1 1024M 0 rom
> > >
> > > [root@archmq ~]# mdadm --misc --detail /dev/md0
> > >
> > > /dev/md0:
> > > Version : 1.2
> > >
> > > Creation Time : Sat Jul 29 16:37:05 2017
> > >
> > > Raid Level : raid10
> > > Array Size : 4191232 (4.00 GiB 4.29 GB)
> > >
> > > Used Dev Size : 4191232 (4.00 GiB 4.29 GB)
> > >
> > > Raid Devices : 2
> > >
> > > Total Devices : 2
> > >
> > > Persistence : Superblock is persistent
> > >
> > > Update Time : Sun Aug 27 09:30:33 2017
> > >
> > > State : clean
> > >
> > > Active Devices : 2
> > >
> > > Working Devices : 2
> > >
> > > Failed Devices : 0
> > >
> > > Spare Devices : 0
> > >
> > > Layout : far=2
> > >
> > > Chunk Size : 512K
> > >
> > > Name : archiso:0
> > > UUID : 43f4be59:c8d2fa0a:a94acdff:1c7f2f4e
> > >
> > > Events : 485
> > >
> > > Number Major Minor RaidDevice State
> > >
> > > 0 8 1 0 active sync /dev/sda1
> > > 1 8 17 1 active sync /dev/sdb1
> > >
> > > ===
> > >
> > > In words: 2 virtual disks, RAID10 setup with far-2 layout, LUKS on it,
> > > then
> > > LVM, then ext4 for boot, swap and btrfs for /.
> > >
> > > I couldn't reproduce the issue with single disk without RAID.
> >
> > Could you verify if the following patch fixes your issue?

Yes, the patch should address this kind of issue, not related
with RAID specially, and the latest version can be found in the
following link:

https://marc.info/?l=linux-block&m=150579298505484&w=2

--
Ming