On Sat, Aug 13, 2016 at 03:38:39PM +0800, Eryu Guan wrote: > Hi all, > > I've hit generic/224 flooding dmesg on 512 block size XFS, 4.8-rc1 > kernel, with the following message: > > ... > [ 98.146091] XFS (sda6): page discard on page ffffea0002f7e780, inode 0xe3a87, offset 1085214720. > [ 98.147431] XFS (sda6): page discard on page ffffea00023c3800, inode 0xe3a87, offset 1085218816. > [ 98.148743] XFS (sda6): page discard on page ffffea0002247700, inode 0xe3a87, offset 1085222912. > [ 98.150136] XFS (sda6): page discard on page ffffea0002f8d000, inode 0xe3a87, offset 1085227008. > [ 98.151496] XFS (sda6): page discard on page ffffea0002c58840, inode 0xe3a87, offset 1085231104. > [ 98.152794] XFS (sda6): page discard on page ffffea0002e65340, inode 0xe3a87, offset 1085235200. > ... > > The inode number is always the same, only the page address and offset > are changing. > > This is triggered by this dd command in generic/224: > > dd if=/dev/zero of=$SCRATCH_MNT/testfile.$i bs=4k conv=notrunc > > and it won't return until you kill it. It's not infinite. It just does it for every page and 1000 processes all trying to write 256,000 pages is a lot.... We have a fix pending for it and I'm aiming to get it to Linus later this week. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
