From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [PATCH PV_OPS PCIFRONT] Date: Fri, 6 Nov 2009 17:11:13 -0500 Message-ID: <20091106221113.GA14124@phenom.dumpdata.com> References: <1257456819-782-1-git-send-email-konrad.wilk@oracle.com> <20091105220414.GA3820@phenom.dumpdata.com> <4AF497BE.1030806@goop.org> <20091106215035.GA22320@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20091106215035.GA22320@phenom.dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jeremy Fitzhardinge Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org > > What does that warning mean? > > Something about slowpath. Didn't dive any deeper in this. I think it complains > about the workqueue taking too long to do its job. Here is another one I get (it is unrelated to Xen - a general USB floppy issue): scsi 9:0:0:0: Direct-Access TEAC FD-05PUB 3200 PQ: 0 ANSI: 0 CCS sd 9:0:0:0: Attached scsi generic sg4 type 0 sd 8:0:0:0: [sdc] Assuming drive cache: write through sdc: sdc1 sdc2 sdc3 ------------[ cut here ]------------ WARNING: at /mnt/tmp/fc11/xen/lib/dma-debug.c:860 check_for_stack+0xfa/0x15e() Hardware name: To Be Filled By O.E.M. ohci_hcd 0000:00:12.1: DMA-API: device driver maps memory fromstack [addr=ffff8801d4129de8] Modules linked in: dvb_core tuner_simple tuner_types tda9887 tda8290 snd_hda_codec_atihdmi snd_hda_codec_realtek radeon tuner snd_hda_intel snd_usb_audio snd_hda_codec cx8800 snd_usb_lib cx8802 cx88xx snd_rawmidi snd_pcm snd_seq_device ttm snd_hwdep pwc snd_timer ir_common snd drm v4l2_common videodev ata_generic tveeprom firewire_ohci pl2303 btcx_risc r8169 usb_storage firewire_core i2c_piix4 soundcore pata_acpi usbserial v4l1_compat videobuf_dma_sg tg3 v4l2_compat_ioctl32 floppy videobuf_core i2c_algo_bit mii pata_atiixp snd_page_alloc i2c_core crc_itu_t shpchp serio_raw wmi pcspkr [last unloaded: scsi_wait_scan] Pid: 999, comm: usb-storage Tainted: G W 2.6.31.4 #1 Call Trace: [] warn_slowpath_common+0xc9/0x10c [] warn_slowpath_fmt+0x60/0x84 [] ? xen_restore_fl_direct_end+0x0/0x1 [] check_for_stack+0xfa/0x15e [] debug_dma_map_page+0x111/0x163 [] dma_map_single_attrs.clone.2+0xfa/0x128 [] usb_hcd_submit_urb+0x1bf/0xd84 [] ? __xen_spin_lock+0x11f/0x150 [] ? xen_spin_unlock+0x27/0x7d [] usb_submit_urb+0x463/0x487 [] usb_stor_msg_common+0x105/0x1e1 [usb_storage] [] usb_stor_ctrl_transfer+0xb5/0x100 [usb_storage] [] usb_stor_CB_transport+0x59/0x2cd [usb_storage] [] usb_stor_invoke_transport+0x1fe/0x494 [usb_storage] [] usb_stor_ufi_command+0x8f/0xac [usb_storage] [] usb_stor_control_thread+0x1e9/0x31f [usb_storage] [] ? xen_restore_fl_direct_end+0x0/0x1 [] ? usb_stor_control_thread+0x0/0x31f [usb_storage] [] kthread+0xbe/0xcd [] child_rip+0xa/0x20 [] ? int_ret_from_sys_call+0x7/0x1b [] ? retint_restore_args+0x5/0x6 [] ? child_rip+0x0/0x20 ---[ end trace a7919e7f17c0a727 ]--- sd 8:0:0:0: [sdc] Assuming drive cache: write through sd 8:0:0:0: [sdc] Attached SCSI removable disk usb 1-5:1.0: uevent usb 1-5: uevent sd 9:0:0:0: [sdd] 2880 512-byte logical blocks: (1.47 MB/1.40 MiB) ohci_hcd 0000:00:12.1: urb ffff8801d89f0e40 path 3 ep1in 93120000 cc 9 --> status -121 sd 9:0:0:0: [sdd] Write Protect is off sd 9:0:0:0: [sdd] Mode Sense: 00 46 94 00 sd 9:0:0:0: [sdd] Assuming drive cache: write through ohci_hcd 0000:00:12.1: urb ffff8801d2dd6a80 path 3 ep1in 92120000 cc 9 --> status -121