So, I have been running the patched kernel for quiet a while now, and it works fine for me, but last night I did hit a surprising issue - the Linux emulator does not work on Ryzen / Epyc. I tried this on two machines (both with the patches) and it coredumps when simply running bash on both of them. I copied the OS over to an Intel machine, and that works fine. I have not tried running with an unpatched kernel on the Ryzen machine (I dont have one to hand) but I did try applying the sysctls to the Intel box to see if that wuld cause the Linux binaries to crash. It didn't. -pete.
Konstantin Belousov
2018-Jul-27 13:00 UTC
Ryzen issues on FreeBSD ? (with sort of workaround)
On Fri, Jul 27, 2018 at 12:01:09PM +0100, Pete French wrote:> So, I have been running the patched kernel for quiet a while now, and it > works fine for me, but last night I did hit a surprising issue - the > Linux emulator does not work on Ryzen / Epyc. I tried this on two > machines (both with the patches) and it coredumps when simply running > bash on both of them. I copied the OS over to an Intel machine, and that > works fine. > > I have not tried running with an unpatched kernel on the Ryzen machine > (I dont have one to hand) but I did try applying the sysctls to the > Intel box to see if that wuld cause the Linux binaries to crash. It didn't.I highly doubt that this can be related. BTW, I forgot about the patch. If nothing happens, I will commit it today.
On 7/27/2018 7:01 AM, Pete French wrote:> So, I have been running the patched kernel for quiet a while now, and it > works fine for me, but last night I did hit a surprising issue - the > Linux emulator does not work on Ryzen / Epyc. I tried this on two > machines (both with the patches) and it coredumps when simply running > bash on both of them. I copied the OS over to an Intel machine, and that > works fine. > > I have not tried running with an unpatched kernel on the Ryzen machine > (I dont have one to hand) but I did try applying the sysctls to the > Intel box to see if that wuld cause the Linux binaries to crash. It didn't.I havent used the linux emulator in ages. What is the easiest way to try this out ? ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 x203 Sentex Communications, mike at sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada