Re: Re: Crash in kvmppc_xive_release()

2019-07-21 Thread Michael Ellerman
On Thu, 2019-07-18 at 21:51:54 UTC, =?UTF-8?Q?C=c3=a9dric_Le_Goater?= wrote: > On 18/07/2019 15:14, Cédric Le Goater wrote: ... > > Here is a fix. Could you give it a try on your system ? > > Thanks, > > C. > > >From b6f728ca19a9540c8bf4f5a56991c4e3dab4cf56 Mon Sep 17 00:00:00 2001 > From: =?

Re: Crash in kvmppc_xive_release()

2019-07-19 Thread Cédric Le Goater
On 19/07/2019 13:20, Michael Ellerman wrote: > Cédric Le Goater writes: >> On 18/07/2019 14:49, Michael Ellerman wrote: >>> Anyone else seen this? >>> >>> This is running ~176 VMs on a Power9 (1 per thread), host crashes: >> >> This is beyond the underlying limits of XIVE. >> >> As we allocate 2K

Re: Crash in kvmppc_xive_release()

2019-07-19 Thread Michael Ellerman
Cédric Le Goater writes: > On 18/07/2019 14:49, Michael Ellerman wrote: >> Anyone else seen this? >> >> This is running ~176 VMs on a Power9 (1 per thread), host crashes: > > This is beyond the underlying limits of XIVE. > > As we allocate 2K vCPUs per VM, that is 16K EQs for interrupt events. T

Re: Crash in kvmppc_xive_release()

2019-07-19 Thread Michael Ellerman
Cédric Le Goater writes: > On 18/07/2019 15:14, Cédric Le Goater wrote: >> On 18/07/2019 14:49, Michael Ellerman wrote: >>> Anyone else seen this? >>> >>> This is running ~176 VMs on a Power9 (1 per thread), host crashes: >> >> This is beyond the underlying limits of XIVE. >> >> As we allocate

Re: Crash in kvmppc_xive_release()

2019-07-18 Thread Cédric Le Goater
On 18/07/2019 15:14, Cédric Le Goater wrote: > On 18/07/2019 14:49, Michael Ellerman wrote: >> Anyone else seen this? >> >> This is running ~176 VMs on a Power9 (1 per thread), host crashes: > > This is beyond the underlying limits of XIVE. > > As we allocate 2K vCPUs per VM, that is 16K EQs for

Re: Crash in kvmppc_xive_release()

2019-07-18 Thread Cédric Le Goater
On 18/07/2019 14:49, Michael Ellerman wrote: > Anyone else seen this? > > This is running ~176 VMs on a Power9 (1 per thread), host crashes: This is beyond the underlying limits of XIVE. As we allocate 2K vCPUs per VM, that is 16K EQs for interrupt events. The overall EQ count is 1M. I let you

Crash in kvmppc_xive_release()

2019-07-18 Thread Michael Ellerman
Anyone else seen this? This is running ~176 VMs on a Power9 (1 per thread), host crashes: [ 66.403750][ T6423] xive: OPAL failed to allocate VCPUs order 11, err -10 [188523.080935670,4] Spent 1783 msecs in OPAL call 135! [ 66.484965][ T6250] BUG: Kernel NULL pointer dereference at 0x000