Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-14 Thread Fengguang Wu
On Sat, Jul 14, 2012 at 04:19:03PM +0100, Al Viro wrote: > On Sat, Jul 14, 2012 at 10:34:59PM +0800, Fengguang Wu wrote: > > On Sat, Jul 14, 2012 at 03:14:15PM +0100, Al Viro wrote: > > > On Sat, Jul 14, 2012 at 09:58:49PM +0800, Fengguang Wu wrote: > > > > > Hi Al, here I got the output for > > >

Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-14 Thread Al Viro
On Sat, Jul 14, 2012 at 10:34:59PM +0800, Fengguang Wu wrote: > On Sat, Jul 14, 2012 at 03:14:15PM +0100, Al Viro wrote: > > On Sat, Jul 14, 2012 at 09:58:49PM +0800, Fengguang Wu wrote: > > > > Hi Al, here I got the output for > > > > > > > > (qemu) sendkey alt-sysrq-l > > > > (qemu) sendkey alt-

Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-14 Thread Fengguang Wu
On Sat, Jul 14, 2012 at 03:14:15PM +0100, Al Viro wrote: > On Sat, Jul 14, 2012 at 09:58:49PM +0800, Fengguang Wu wrote: > > > Hi Al, here I got the output for > > > > > > (qemu) sendkey alt-sysrq-l > > > (qemu) sendkey alt-sysrq-t > > > > I repeated that several times and here are the results. >

Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-14 Thread Al Viro
On Sat, Jul 14, 2012 at 09:58:49PM +0800, Fengguang Wu wrote: > > Hi Al, here I got the output for > > > > (qemu) sendkey alt-sysrq-l > > (qemu) sendkey alt-sysrq-t > > I repeated that several times and here are the results. > > (qemu) sendkey alt-sysrq-l > (qemu) sendkey alt-sysrq-l > (qemu) se

Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-14 Thread Fengguang Wu
On Sat, Jul 14, 2012 at 02:05:10PM +0100, Al Viro wrote: > On Tue, Jul 10, 2012 at 10:18:30PM +0800, w...@linux.intel.com wrote: > > Hi Al, > > > > The linux-next kernel reliably hung after this line: > > > > [4.846260] debug: unmapping init [mem > > 0x88000182a000-0x8800019f] >

Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-14 Thread Al Viro
On Tue, Jul 10, 2012 at 10:18:30PM +0800, w...@linux.intel.com wrote: > Hi Al, > > The linux-next kernel reliably hung after this line: > > [4.846260] debug: unmapping init [mem > 0x88000182a000-0x8800019f] > > And it's bisected to commit: > > commit 4a9ffe81385c2af04f2

Re: Kernel boot hangs on commit "switch fput to task_work_add"

2012-07-12 Thread Fengguang Wu
On Tue, Jul 10, 2012 at 10:18:30PM +0800, w...@linux.intel.com wrote: > Hi Al, > > The linux-next kernel reliably hung after this line: > > [4.846260] debug: unmapping init [mem > 0x88000182a000-0x8800019f] FYI, in another config (attached), it hangs after: [6.803484] debug