From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261451AbUENPHU (ORCPT ); Fri, 14 May 2004 11:07:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261498AbUENPHU (ORCPT ); Fri, 14 May 2004 11:07:20 -0400 Received: from lucidpixels.com ([66.45.37.187]:2275 "HELO lucidpixels.com") by vger.kernel.org with SMTP id S261451AbUENPHG (ORCPT ); Fri, 14 May 2004 11:07:06 -0400 Date: Fri, 14 May 2004 11:07:04 -0400 (EDT) From: Justin Piszcz X-X-Sender: jpiszcz@p500 To: bert hubert cc: linux-kernel@vger.kernel.org Subject: Re: Linux Kernel 2.6 SMP+HT + 1 Intel P4 HT CPU In-Reply-To: <20040514133947.GB21039@outpost.ds9a.nl> Message-ID: References: <5D3C2276FD64424297729EB733ED1F7605FAE205@email1.mitretek.org> <20040514133947.GB21039@outpost.ds9a.nl> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org So essentially, if one does not enable SMP in Linux, they are not taking advantage of hyper threading!? On Fri, 14 May 2004, bert hubert wrote: > On Fri, May 14, 2004 at 08:49:39AM -0400, Justin Piszcz wrote: > > Why would you use SMP on an HT cpu? > > Is this reccomended? > > Yes, it acts like one. > > > > > > > > > > > > -----Original Message----- > > > From: linux-kernel-owner@vger.kernel.org > > > [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Alberto > > > Bertogli > > > Sent: Thursday, May 13, 2004 8:42 PM > > > To: linux-usb-devel@lists.sourceforge.net > > > Cc: linux-kernel@vger.kernel.org > > > Subject: BUG when removing USB flash drive > > > > > > Hi! > > > > > > I've just hit a bug after removing a Kingston USB flash drive. > > > > > > I have removed it several (probably more than 40) times today without > > > problems until now. I'm removing it while doing streaming write()s on > > > the device (using /dev/sda) because I'm testing some things with the > > > drive. This was just like all the other times, so it looks like a race > > > somewhere. > > > > > > This is a stock 2.6.6 kernel, on a Pentium 4 with HT (the kernel is > > > compiled with both SMP and preempt). > > > > > > After the BUG the kernel doesn't detect the device anymore. > > > > > > Please let me know if you need any more information or if I can give you > > > a > > > hand with testing. > > > > > > Thanks a lot, > > > Alberto > > > > > > > > > kernel BUG at drivers/usb/storage/usb.c:848! > > > invalid operand: 0000 [#1] > > > PREEMPT SMP > > > CPU: 1 > > > EIP: 0060:[] Not tainted > > > EFLAGS: 00010202 (2.6.6) > > > EIP is at usb_stor_release_resources+0xa3/0xcd > > > eax: 00002832 ebx: c639e200 ecx: c04bd768 edx: debf2888 > > > esi: c04c6780 edi: c308ac00 ebp: c308ac24 esp: dededeb0 > > > ds: 007b es: 007b ss: 0068 > > > Process khubd (pid: 10, threadinfo=dedec000 task=dedef770) > > > Stack: debf2888 debf2854 c02e9f48 c639e200 debf2854 de40a670 debf2864 > > > c04c67a0 > > > c0272926 debf2864 debf288c debf2864 c308acd0 c0272a4d debf2864 > > > debf28bc > > > debf2864 c308acd0 c0271b06 debf2864 debf2864 c308ac00 c0271b57 > > > debf2864 > > > Call Trace: > > > [] usb_unbind_interface+0x7a/0x7c > > > [] device_release_driver+0x64/0x66 > > > [] bus_remove_device+0x56/0x98 > > > [] device_del+0x5f/0x9d > > > [] device_unregister+0x13/0x23 > > > [] usb_disable_device+0x71/0xac > > > [] usb_disconnect+0x9c/0xeb > > > [] hub_port_connect_change+0x274/0x279 > > > [] hub_port_status+0x45/0xb0 > > > [] hub_events+0x2e9/0x364 > > > [] hub_thread+0x2d/0xe8 > > > [] ret_from_fork+0x6/0x14 > > > [] default_wake_function+0x0/0x12 > > > [] hub_thread+0x0/0xe8 > > > [] kernel_thread_helper+0x5/0xb > > > > > > Code: 0f 0b 50 03 05 a6 43 c0 e9 7c ff ff ff c7 80 e0 01 00 00 00 > > > > > > > > > Five seconds later, this comes out: > > > > > > <1>Unable to handle kernel paging request at virtual address 31a875c8 > > > printing eip: > > > c0307b2b > > > *pde = 00000000 > > > Oops: 0002 [#2] > > > PREEMPT SMP > > > CPU: 0 > > > EIP: 0060:[] Not tainted > > > EFLAGS: 00010002 (2.6.6) > > > EIP is at usb_stor_control_thread+0x14d/0x2c9 > > > eax: 31a875c8 ebx: c639e200 ecx: c639e200 edx: 00002003 > > > esi: c639e600 edi: d3c84000 ebp: d3c84000 esp: d3c85f9c > > > ds: 007b es: 007b ss: 0068 > > > Process usb-storage (pid: 10290, threadinfo=d3c84000 task=c76b0130) > > > Stack: dec00800 c639e200 c76b0698 c639e310 c639e324 c76b0130 c13e5ca0 > > > dededda8 > > > c0105f86 dedef770 c03079de 00000000 c639e200 00000000 00000000 > > > 00000000 > > > 00000000 c03079de 00000000 00000000 00000000 c0104271 c639e200 > > > 00000000 > > > Call Trace: > > > [] ret_from_fork+0x6/0x14 > > > [] usb_stor_control_thread+0x0/0x2c9 > > > [] usb_stor_control_thread+0x0/0x2c9 > > > [] kernel_thread_helper+0x5/0xb > > > > > > Code: f0 fe 08 0f 88 38 0b 00 00 8b 83 b8 00 00 00 81 b8 50 01 00 > > > <6>note: usb-storage[10290] exited with preempt_count 1 > > > > > > > > > > > > > > > - > > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" > > > in > > > the body of a message to majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > Please read the FAQ at http://www.tux.org/lkml/ > > > > > > > > - > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > > -- > http://www.PowerDNS.com Open source, database driven DNS Software > http://lartc.org Linux Advanced Routing & Traffic Control HOWTO >