On Fri, 2014-09-26 at 11:22 +0800, jammy wrote: > Hi all， > > I have build a multi-aps network，and there are wifi clients roaming in the network. Now I use the standard ath9k driver，and I found that the time of handoff is as long as 3 to 4 seconds，it is too long to process the Voip service and so on. > I think the problem can be solved by modify the driver，anyone has tried it？ Are all the SSIDs the same? What kind of authentication? WPA Enterprise/802.1x? What EAP methods? Is pre-authentication enabled on the network and in the client? Is background scanning enabled in wpa_supplicant, and if so what is the interval? Some sanitized logs (with -dddt!) showing the slow roaming attempts would be very helpful in figuring out what might be going wrong. There are a ton of moving parts, and all of them have to be working correctly for roaming to happen quickly. Dan > Any help will be appreciated. > > Waiting for your reply. > > from jammy's iPhone > > 在 2014年9月22日，20:59，Lorenzo Bianconi <lorenzo.bianconi83@xxxxxxxxx> 写道： > > >> Hi, all， > > > > Hi, > > > >> I have read the http://www.spinics.net/lists/linux-wireless/msg124980.html for patching the ath9k driver in compat-wireless-2014-05-22 in openwrt trunk, but when I patch, for example, “the [PATCH 01/10] ath9k: export methods related to ack timeout estimation”, it failed. > > > > please use latest dynack patchset: > > http://www.spinics.net/lists/linux-wireless/msg127038.html > > > >> the command window showed that： > >> patching file drivers/net/wireless/ath/ath9k/hw.h > >> Hunk #1 FAILED at 1080. > >> 1 out of 1 hunk FAILED -- saving rejects to file drivers/net/wireless/ath/ath9k/hw.h.rej. > >> > >> i have checked the hw.h file, but I can not see anything wrong, how should i do further? > > > > You should port dynack on compat-wireless-2014-05-22. E.g: > > > > --- a/drivers/net/wireless/ath/ath9k/hw.h > > +++ b/drivers/net/wireless/ath/ath9k/hw.h > > @@ -1080,6 +1080,10 @@ void ar9002_hw_load_ani_reg(struct ath_hw *ah, > > struct ath9k_channel *chan); > > void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning); > > void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan); > > > > +void ath9k_hw_set_ack_timeout(struct ath_hw *ah, u32 us); > > +void ath9k_hw_set_cts_timeout(struct ath_hw *ah, u32 us); > > +void ath9k_hw_setslottime(struct ath_hw *ah, u32 us); > > + > > #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT > > static inline bool ath9k_hw_btcoex_is_enabled(struct ath_hw *ah) > > { > > > > this chunk will fail since OpenWRT uses CPTCFG_ATH9K_BTCOEX_SUPPORT > > insted of CONFIG_ATH9K_BTCOEX_SUPPORT > > > >> another question is，if I patch them manualy，I can not see the dnyack choice in the menuconfig，what should I do then？ > > > > You should add dynack to OpenWRT mac80211 package Makefile > > > >> I am waiting for your suggestions. > >> > >> from jammy's iPhone-- > >> 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 > > > > Regards, > > Lorenzo > > > > -- > > UNIX is Sexy: who | grep -i blonde | talk; cd ~; wine; talk; touch; > > unzip; touch; strip; gasp; finger; gasp; mount; fsck; more; yes; gasp; > > umount; make clean; sleep > -- > 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 -- 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
