Sorry, forgot to cc Wally Francis On Sun, 2008-12-07 at 21:33 +0200, Maxim Levitsky wrote: > Hi, > > I have spent whole day on this, but I am close. > you, Walter Francis, were completely right that there is huge speed > regression between 2.6.25 and 2.6.26, take look at the results: > > I am talking now about transfer speeds between router and iwl3945, so > download speed is more or less the same on 2.6.26 and .25, it dropped > from 2.4 Mb/s to 2.0 Mb/s, still a regression, but upload speed dropped > from 3.0 (!) Mb/s to just 1.2 Mb/s maximum. > > Note, that I observed sharp drops in speed on both .26 and .25, after a > while. > > on 2.6.25 speeds drops drasticly from 3.0 Mb/s /2.4 Mb/s to 1.0 Mb/s , > 150 Kb/s (not typo) > > on 2.6.26, upload speed changes a lot, and it is usually at 600~800 > Kb/s, but download speeds also drops to 150 kb/s. > Those drops happen at same time (both upload and download). > > > Bisect results: > > > 17eed249539a7b756ca65a5cb0940abc48ef553b <- bad (1) > > 6002f266b3e7f0acc2d5158cddbed41730b02e82 <- doesn't load (2) > > 8318d78a44d49ac1edf2bdec7299de3617c4232e <- doesn't load (3) > <cfg80211 APIfor channels/bitrates, mac80211 and driver conversion> > > 10b6b80145cc93887dd8aab99bfffa375e9add31 <- good (predicted) (4) > > > > > (4) is the last good revision, then next revision (3) makes the driver > show a backtrace, and fail. > > (2) still doesn't load > > (1) loads and have low transfer speeds. > > Currently I search for commit between (1) and (2) that fixed loading > issue, then I will try to backport it, to find the exact commit. > > > > the backtrace: > > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374773] [ext3:warn_on_slowpath+0x5f/0xc20] warn_on_slowpath+0x5f/0x90 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374781] [acpi_cpufreq:kmem_cache_alloc+0x6d/0x530] ? kmem_cache_alloc+0x6d/0xb0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374785] [wiphy_register+0x14f/0x170] wiphy_register+0x14f/0x170 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374788] [iwl3945:ieee80211_register_hw+0x2d/0x330] ieee80211_register_hw+0x2d/0x2c0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374799] [iwl3945:iwl3945_pci_probe+0xd0c/0x1690] :iwl3945:iwl3945_pci_probe+0xd0c/0x1690 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374803] [find_inode+0x53/0x90] ? find_inode+0x53/0x90 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374807] [sysfs_ilookup_test+0x0/0x20] ? sysfs_ilookup_test+0x0/0x20 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374810] [ext3:iput+0x4a/0x750] ? iput+0x4a/0x90 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374814] [sysfs_find_dirent+0x2d/0x40] ? sysfs_find_dirent+0x2d/0x40 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374819] [snd_pcm:_spin_lock+0x16/0x80] ? _spin_lock+0x16/0x40 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374822] [snd_pcm:_spin_unlock+0x10/0x100] ? _spin_unlock+0x10/0x40 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374826] [pci_device_probe+0x7c/0xa0] pci_device_probe+0x7c/0xa0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374833] [driver_probe_device+0xa2/0x1e0] driver_probe_device+0xa2/0x1e0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374836] [__driver_attach+0x0/0xb0] ? __driver_attach+0x0/0xb0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374839] [__driver_attach+0xab/0xb0] __driver_attach+0xab/0xb0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374843] [bus_for_each_dev+0x6b/0xa0] bus_for_each_dev+0x6b/0xa0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374846] [acpi_cpufreq:kmem_cache_alloc+0x6d/0x530] ? kmem_cache_alloc+0x6d/0xb0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374850] [usbcore:driver_attach+0x1c/0x3d0] driver_attach+0x1c/0x20 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374853] [bus_add_driver+0x1f8/0x270] bus_add_driver+0x1f8/0x270 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374857] [usbcore:driver_register+0x47/0x120] driver_register+0x47/0x120 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374860] [tg3:__pci_register_driver+0x5a/0x2b0] __pci_register_driver+0x5a/0xa0 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374867] [iwl3945:init_module+0x3f/0xb5000] :iwl3945:iwl3945_init+0x3f/0x93 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374871] [sys_init_module+0x154/0x1e90] sys_init_module+0x154/0x1e90 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374876] [snd_hda_intel:_spin_unlock_irqrestore+0x12/0xc0] ? _spin_unlock_irqrestore+0x12/0x40 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374881] [<ffffffff804be4b0>] ? ieee80211_rx_irqsafe+0x0/0x80 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374887] [system_call_after_swapgs+0x7b/0x80] system_call_after_swapgs+0x7b/0x80 > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374890] > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374892] ---[ end trace 4e9e244a59472c97 ]--- > Dec 6 15:55:47 maxim-laptop kernel: [ 16.374894] iwl3945: Failed to register network device (error -22) > > > Bes > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
