Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-20 Thread Bharata B Rao
On Tue, May 21, 2019 at 12:55:49AM +1000, Nicholas Piggin wrote: > Bharata B Rao's on May 21, 2019 12:29 am: > > On Mon, May 20, 2019 at 01:50:35PM +0530, Bharata B Rao wrote: > >> On Mon, May 20, 2019 at 05:00:21PM +1000, Nicholas Piggin wrote: > >> > Bharata B Rao's on May 20, 2019 3:56 pm: > >>

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-20 Thread Aneesh Kumar K.V
On 5/20/19 8:25 PM, Nicholas Piggin wrote: Bharata B Rao's on May 21, 2019 12:29 am: On Mon, May 20, 2019 at 01:50:35PM +0530, Bharata B Rao wrote: On Mon, May 20, 2019 at 05:00:21PM +1000, Nicholas Piggin wrote: Bharata B Rao's on May 20, 2019 3:56 pm: On Mon, May 20, 2019 at 02:48:35PM

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-20 Thread Nicholas Piggin
Bharata B Rao's on May 21, 2019 12:29 am: > On Mon, May 20, 2019 at 01:50:35PM +0530, Bharata B Rao wrote: >> On Mon, May 20, 2019 at 05:00:21PM +1000, Nicholas Piggin wrote: >> > Bharata B Rao's on May 20, 2019 3:56 pm: >> > > On Mon, May 20, 2019 at 02:48:35PM +1000, Nicholas Piggin wrote: >> >

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-20 Thread Bharata B Rao
On Mon, May 20, 2019 at 01:50:35PM +0530, Bharata B Rao wrote: > On Mon, May 20, 2019 at 05:00:21PM +1000, Nicholas Piggin wrote: > > Bharata B Rao's on May 20, 2019 3:56 pm: > > > On Mon, May 20, 2019 at 02:48:35PM +1000, Nicholas Piggin wrote: > > >> >> > git bisect points to > > >> >> > > > >>

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-20 Thread Bharata B Rao
On Mon, May 20, 2019 at 05:00:21PM +1000, Nicholas Piggin wrote: > Bharata B Rao's on May 20, 2019 3:56 pm: > > On Mon, May 20, 2019 at 02:48:35PM +1000, Nicholas Piggin wrote: > >> >> > git bisect points to > >> >> > > >> >> > commit 4231aba000f5a4583dd9f67057aadb68c3eca99d > >> >> > Author:

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-20 Thread Nicholas Piggin
Bharata B Rao's on May 20, 2019 3:56 pm: > On Mon, May 20, 2019 at 02:48:35PM +1000, Nicholas Piggin wrote: >> >> > git bisect points to >> >> > >> >> > commit 4231aba000f5a4583dd9f67057aadb68c3eca99d >> >> > Author: Nicholas Piggin >> >> > Date: Fri Jul 27 21:48:17 2018 +1000 >> >> > >> >> >

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-19 Thread Bharata B Rao
On Mon, May 20, 2019 at 02:48:35PM +1000, Nicholas Piggin wrote: > >> > git bisect points to > >> > > >> > commit 4231aba000f5a4583dd9f67057aadb68c3eca99d > >> > Author: Nicholas Piggin > >> > Date: Fri Jul 27 21:48:17 2018 +1000 > >> > > >> > powerpc/64s: Fix page table fragment refcount

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-19 Thread Nicholas Piggin
Bharata B Rao's on May 20, 2019 2:25 pm: > On Mon, May 20, 2019 at 12:02:23PM +1000, Michael Ellerman wrote: >> Bharata B Rao writes: >> > On Thu, May 16, 2019 at 07:44:20PM +0530, srikanth wrote: >> >> Hello, >> >> >> >> On power9 host, performing memory hotunplug from ppc64le guest results in

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-19 Thread Bharata B Rao
On Mon, May 20, 2019 at 12:02:23PM +1000, Michael Ellerman wrote: > Bharata B Rao writes: > > On Thu, May 16, 2019 at 07:44:20PM +0530, srikanth wrote: > >> Hello, > >> > >> On power9 host, performing memory hotunplug from ppc64le guest results in > >> kernel oops. > >> > >> Kernel used :

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-19 Thread Michael Ellerman
Bharata B Rao writes: > On Thu, May 16, 2019 at 07:44:20PM +0530, srikanth wrote: >> Hello, >> >> On power9 host, performing memory hotunplug from ppc64le guest results in >> kernel oops. >> >> Kernel used : https://github.com/torvalds/linux/tree/v5.1 built using >> ppc64le_defconfig for host

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-18 Thread Bharata B Rao
On Thu, May 16, 2019 at 07:44:20PM +0530, srikanth wrote: > Hello, > > On power9 host, performing memory hotunplug from ppc64le guest results in > kernel oops. > > Kernel used : https://github.com/torvalds/linux/tree/v5.1 built using > ppc64le_defconfig for host and ppc64le_guest_defconfig for

Re: PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-17 Thread Michael Ellerman
srikanth writes: > Hello, > > On power9 host, performing memory hotunplug from ppc64le guest results > in kernel oops. Thanks for the report. Did this used to work in the past? If so what is the last version that worked? > Kernel used : https://github.com/torvalds/linux/tree/v5.1 built using

PROBLEM: Power9: kernel oops on memory hotunplug from ppc64le guest

2019-05-16 Thread srikanth
Hello, On power9 host, performing memory hotunplug from ppc64le guest results in kernel oops. Kernel used : https://github.com/torvalds/linux/tree/v5.1 built using ppc64le_defconfig for host and ppc64le_guest_defconfig for guest. Recreation steps: 1. Boot a guest with below mem