Re: [ANNOUNCE] 2.6.31.12-rt21

Peter Zijlstra
2010-02-23T20:12:50Z

On Tue, 2010-02-23 at 11:01 -0800, Fernando Lopez-Lezcano wrote:
> On Thu, 2010-02-18 at 17:54 +0100, Thomas Gleixner wrote:
> > We are pleased to announce the next update to our new preempt-rt
> > series.
> >
> > - fixes and cherry-picks all over the place
> >
> > - tracer fixes from Carsten
>
> Seeing this here, otherwise seems fine:
>
> BUG: sleeping function called from invalid context at
> arch/x86/mm/highmem_32.c:9
> in_atomic(): 1, irqs_disabled(): 0, pid: 1984, name: Xorg
> Pid: 1984, comm: Xorg Not tainted
> 2.6.31.12-1.rt21.1.fc11.ccrma.i686.rtPAE #1
> Call Trace:
> [<c0431852>] __might_sleep+0xc6/0xcb
> [<c042b494>] kmap+0x47/0x5a
> [<f8049ca7>] i915_gem_pwrite_ioctl+0x3ea/0x631 [i915]
> [<f7f61721>] drm_ioctl+0x208/0x2a9 [drm]
> [<f80498bd>] ? i915_gem_pwrite_ioctl+0x0/0x631 [i915]
> [<c0589d80>] ? inode_has_perm+0x69/0x84
> [<c07a31ff>] ? rt_mutex_lock+0x28/0x2b
> [<c046a7f3>] ? rt_down+0x1a/0x1d
> [<c04e6581>] vfs_ioctl+0x5c/0x76
> [<c04e6ae9>] do_vfs_ioctl+0x4a0/0x4de
> [<c058a00f>] ? selinux_file_ioctl+0x43/0x46
> [<c04e6b6d>] sys_ioctl+0x46/0x66
> [<c04090d3>] sysenter_do_call+0x12/0x28

io_mapping_map_atomic_wc() still appears to use the actual kmap_atomic
stuff, and we seem to miss an kmap_prot_pfn() function to fill that gap
with, I'll try and implement that tomorrow.