Hello Andrew, On Fri, Sep 21, 2018 at 12:23:06AM +1200, Andrew Ruthven wrote: > I decided to try the latest 4.9 kernel again tonight and I > tracked down the performance issue I was seeing. iostat was > showing one hard drive with utterly terribly wait times, and > even running smartctl against that drive was epically slow > (all other drives ran normally). > Turns out there was a dodgy SATA cable for that drive. After > swapping the cable, I/O on the machine is back to what it > should be! Glad it could be resolved! > At a guess something has changed in the SATA drivers between > 4.1.x and 4.9.y and that change of behaviour triggered the > issue I was observing. Yeah, sometimes even subtle changes in the kernel have huge impact on certain (especially problematic) hardware. Best, Herbert > Ben, thank you for publishing your kernels! > Cheers, > Andrew > On Mon, 2018-02-05 at 21:47 +1300, Andrew Ruthven wrote: >> Hey, >> Has anyone noticed big I/O issues with this kernel? >> I ran it for a few days, and found that processes (even on the main >> system) were often sitting in a D state, seemingly blocked on I/O. >> But >> there didn't seem to be much I/O happening. Even ssh'ing in to any >> vservers or physical host was incredibly slow. >> Cheers, >> Andrew >> On Tue, 2018-01-30 at 22:50 +0000, Ben Green wrote: >>> Hi all, >>> I've just finished and uploaded Linux kernel 4.9.78 with patch >>> vs2.3.9.6. They are installable directly from the psand.net >>> repository, or via the metapackage: >>> linux-image-vserver-4.9-beng >>> For i386 and amd64 architectures, and there's a version I've >>> compiled >>> with gcc-8 which can be installed directly, or via the metapackage: >>> linux-image-vserver-4.9-beng-reptoline >>> That one is amd64 only of course. These images are only provided >>> in >>> the Debian Stretch distro repositories. Instruction (which need a >>> bit >>> of updating but should get you where you need to be) are at: >>> https://www.psand.net/services/public-repository.html >>> These kernels are minimally tested and as usual come with >>> absolutely >>> no guarantees whatsoever. >>> Cheers, >>> Ben > -- > Andrew Ruthven, Wellington, New Zealand > MIITP > At work: andrew.ruthven@catalyst.net.nz > At home: andrew@etc.gen.nz > Cloud : https://catalystcloud.nz > GPG fpr: C603 FC4E 600F 1CEC D1C8 D97C 4B53 D931 E4D3 E863 > LCA2019: https://lca2019.linux.org.au/