Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-11 Thread Toralf Förster
On 10/11/2013 10:57 AM, Fengguang Wu wrote: > On Fri, Oct 11, 2013 at 10:42:19AM +0200, Toralf Förster wrote: >> yeah, now the picture becomes more clear >> ... >> net.core.warnings = 0 >> [ ok ] >> ick: pause : -717 >>

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-11 Thread Fengguang Wu
On Fri, Oct 11, 2013 at 04:57:01PM +0800, Fengguang Wu wrote: > On Fri, Oct 11, 2013 at 10:42:19AM +0200, Toralf Förster wrote: > > yeah, now the picture becomes more clear > > ... > > net.core.warnings = 0 > > [ ok ] > > ick:

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-11 Thread Fengguang Wu
On Fri, Oct 11, 2013 at 10:42:19AM +0200, Toralf Förster wrote: > yeah, now the picture becomes more clear > ... > net.core.warnings = 0 > [ ok ] > ick: pause : -717 > ick : min_pause : -177 >

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-11 Thread Toralf Förster
yeah, now the picture becomes more clear ... net.core.warnings = 0 [ ok ] ick: pause : -717 ick : min_pause : -177 ick : max_pause : -717

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-10 Thread Fengguang Wu
On Thu, Oct 10, 2013 at 06:49:30PM +0200, Toralf Förster wrote: > On 10/10/2013 12:33 AM, Richard Weinberger wrote: > > Am 09.10.2013 23:47, schrieb Jan Kara: > >> On Wed 09-10-13 20:43:50, Richard Weinberger wrote: > >>> CC'ing mm folks. > >>> Please see below. > >> Added Fenguang to CC since he

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-10 Thread Toralf Förster
On 10/10/2013 12:33 AM, Richard Weinberger wrote: > Am 09.10.2013 23:47, schrieb Jan Kara: >> On Wed 09-10-13 20:43:50, Richard Weinberger wrote: >>> CC'ing mm folks. >>> Please see below. >> Added Fenguang to CC since he is the author of this code. > > Thx, get_maintainer.pl didn't list him. >

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-10 Thread Fengguang Wu
On Thu, Oct 10, 2013 at 08:52:33AM +0200, Geert Uytterhoeven wrote: > On Thu, Oct 10, 2013 at 4:46 AM, Fengguang Wu wrote: > > On Wed, Oct 09, 2013 at 11:47:33PM +0200, Jan Kara wrote: > >> On Wed 09-10-13 20:43:50, Richard Weinberger wrote: > >> > Am 09.10.2013 19:26, schrieb Toralf Förster: > >>

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-09 Thread Geert Uytterhoeven
On Thu, Oct 10, 2013 at 4:46 AM, Fengguang Wu wrote: > On Wed, Oct 09, 2013 at 11:47:33PM +0200, Jan Kara wrote: >> On Wed 09-10-13 20:43:50, Richard Weinberger wrote: >> > Am 09.10.2013 19:26, schrieb Toralf Förster: >> > > On 10/08/2013 10:07 PM, Geert Uytterhoeven wrote: >> > >> On Sun, Oct 6,

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-09 Thread Fengguang Wu
On Wed, Oct 09, 2013 at 11:47:33PM +0200, Jan Kara wrote: > On Wed 09-10-13 20:43:50, Richard Weinberger wrote: > > CC'ing mm folks. > > Please see below. > Added Fenguang to CC since he is the author of this code. Thanks! > > Am 09.10.2013 19:26, schrieb Toralf Förster: > > > On 10/08/2013 10:

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-09 Thread Richard Weinberger
Am 09.10.2013 23:47, schrieb Jan Kara: > On Wed 09-10-13 20:43:50, Richard Weinberger wrote: >> CC'ing mm folks. >> Please see below. > Added Fenguang to CC since he is the author of this code. Thx, get_maintainer.pl didn't list him. >> Am 09.10.2013 19:26, schrieb Toralf Förster: >>> On 10/08/

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-09 Thread Jan Kara
On Wed 09-10-13 20:43:50, Richard Weinberger wrote: > CC'ing mm folks. > Please see below. Added Fenguang to CC since he is the author of this code. > Am 09.10.2013 19:26, schrieb Toralf Förster: > > On 10/08/2013 10:07 PM, Geert Uytterhoeven wrote: > >> On Sun, Oct 6, 2013 at 11:01 PM, Toralf F

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-09 Thread Richard Weinberger
CC'ing mm folks. Please see below. Am 09.10.2013 19:26, schrieb Toralf Förster: > On 10/08/2013 10:07 PM, Geert Uytterhoeven wrote: >> On Sun, Oct 6, 2013 at 11:01 PM, Toralf Förster >> wrote: Hmm, now pages_dirtied is zero, according to the backtrace, but the BUG_ON() asserts it

Re: [uml-devel] BUG: soft lockup for a user mode linux image

2013-10-08 Thread Toralf Förster
Well, the quick&dirty hack below at least works for the moment to overcome the soft lookup and the hang/unresponsiveness of the 32 bit user mode linux guest : diff --git a/mm/page-writeback.c b/mm/page-writeback.c index f5236f8..7e9483c 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @