Dave, Konrad I think we need to back out this change as soon as possible. I will follow up the discussion with Konrad on how we should attempt to handle vm passthrough as soon as things settle down a bit over here. Hopefully this week.
Thomas On 04/06/2011 10:54 AM, Markus Trippelsdorf wrote: > On 2011.04.05 at 18:31 +0200, Markus Trippelsdorf wrote: > >> On 2011.03.29 at 16:56 +0200, Markus Trippelsdorf wrote: >> >>> Just came across this WARNING (running latest git kernel): >>> >>> Mar 29 09:14:39 gentoo kernel: udev[888]: starting version 164 >>> Mar 29 15:45:45 gentoo kernel: ------------[ cut here ]------------ >>> Mar 29 15:45:45 gentoo kernel: WARNING: at >>> drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2b0() >>> Mar 29 15:45:45 gentoo kernel: Hardware name: System Product Name >>> >> It happened again today. >> >> ------------[ cut here ]------------ >> WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 >> ttm_put_pages+0x1c6/0x2c0() >> Hardware name: System Product Name >> Pid: 680, comm: kworker/u:6 Not tainted 2.6.39-rc1-00254-gd297f96 #5 >> Call Trace: >> [<ffffffff810736af>] warn_slowpath_common+0x6f/0xa0 >> [<ffffffff810737fa>] warn_slowpath_null+0x1a/0x20 >> [<ffffffff812c7726>] ttm_put_pages+0x1c6/0x2c0 >> [<ffffffff812bff7d>] ttm_tt_free_alloced_pages+0xbd/0x100 >> [<ffffffff812c0a5c>] ttm_tt_swapout+0x1bc/0x2c0 >> [<ffffffff812c2365>] ttm_bo_swapout+0x1a5/0x240 >> [<ffffffff812b5637>] ? drm_mm_kmalloc+0x37/0xe0 >> [<ffffffff812bf3b8>] ttm_shrink+0xd8/0x140 >> [<ffffffff8108eb01>] ? queue_work+0x21/0x60 >> [<ffffffff812bf420>] ? ttm_shrink+0x140/0x140 >> [<ffffffff812bf439>] ttm_shrink_work+0x19/0x20 >> [<ffffffff8108dade>] process_one_work+0x11e/0x4e0 >> [<ffffffff8108e4ce>] worker_thread+0x16e/0x360 >> [<ffffffff8108e360>] ? manage_workers.isra.28+0x260/0x260 >> [<ffffffff810932ac>] kthread+0x8c/0xa0 >> [<ffffffff8152a394>] kernel_thread_helper+0x4/0x10 >> [<ffffffff81093220>] ? kthread_flush_work_fn+0x20/0x20 >> [<ffffffff8152a390>] ? gs_change+0xb/0xb >> ---[ end trace cb7fc1aad109a0a7 ]--- >> ------------[ cut here ]------------ >> > Looks like this is caused by f9820a46dd7888b05a36e81166fb1abcc47dcc3f : > > ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set. > > CCing the relevant people. > >
