* Re: [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 [not found] ` <trinity-c1a620e7-f7e8-4bb0-b583-b36b6fa6bfd8-1390546555391@3capp-1and1-bs03> @ 2014-01-27 19:02 ` Oleksij Rempel 2014-01-27 19:12 ` Antonio Quartulli 2014-01-27 22:22 ` Johannes Berg 0 siblings, 2 replies; 3+ messages in thread From: Oleksij Rempel @ 2014-01-27 19:02 UTC (permalink / raw) To: mail, ath9k-devel, linux-wireless@vger.kernel.org, Johannes Berg [-- Attachment #1: Type: text/plain, Size: 2101 bytes --] Hi Johannes, i found this bug report with your response: https://bugzilla.redhat.com/show_bug.cgi?id=990955 "I don't think adding a workqueue is a good idea because that would significantly delay the calls in many situations." The problem on ath9k_htc is that the call is already dramatically delayed. It will try to send WMI command over USB with delay of some _msec_ not usec. There are two options right now, use workqueue or do not support sta_rc_update. Am 24.01.2014 07:55, schrieb mail@fuerstflorian.de: > Hello Antonio, > >> Just as a generic suggestion, have you tried testing a slightly older >> kernel versions to see if that makes any difference? > > Thanks for the suggestion. I will try to use a older kernel version, but it will take some days to be > sure if it works again (and I naturally will report about). > > -- > Flo > >> On 23/01/14 23:03, Antonio Quartulli wrote: >> Von: "Antonio Quartulli" <antonio@meshcoding.com> >> An: "Oleksij Rempel" <linux@rempel-privat.de>, mail@fuerstflorian.de, ath9k-devel@lists.ath9k.org, "Antonio Quartulli" <ordex@autistici.org> >> Betreff: Re: [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 >> >> Hi all, >> >> On 23/01/14 20:44, Oleksij Rempel wrote: >>> Hi Antonio, >>> >>> You probably know more about this issue then me. >>> >>> Insight of this mutex are some WMI commands, which are incredible slow >>> on some USB 2.0 devices. >>> >> >> I implemented the ath9k_htc_sta_rc_update() API but I don't really know >> the internals of the ath9k_htc driver...therefore I don't know if these >> WMI commands have any consequence on this..Could it be that this >> slowness is triggering some reaction in the kernel (due to the fact that >> this part of the code is executed while holding a lock)? >> >> Sorry, but I can't really help. >> >> Just as a generic suggestion, have you tried testing a slightly older >> kernel versions to see if that makes any difference? >> >> >> >> -- >> Antonio Quartulli -- Regards, Oleksij [-- Attachment #2: OpenPGP digital signature --] [-- Type: application/pgp-signature, Size: 295 bytes --] ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 2014-01-27 19:02 ` [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 Oleksij Rempel @ 2014-01-27 19:12 ` Antonio Quartulli 2014-01-27 22:22 ` Johannes Berg 1 sibling, 0 replies; 3+ messages in thread From: Antonio Quartulli @ 2014-01-27 19:12 UTC (permalink / raw) To: Oleksij Rempel, mail, ath9k-devel, linux-wireless@vger.kernel.org, Johannes Berg [-- Attachment #1: Type: text/plain, Size: 670 bytes --] On 27/01/14 20:02, Oleksij Rempel wrote: > Hi Johannes, > > i found this bug report with your response: > https://bugzilla.redhat.com/show_bug.cgi?id=990955 > "I don't think adding a workqueue is a good idea because that would > significantly delay the calls in many situations." > > The problem on ath9k_htc is that the call is already dramatically > delayed. It will try to send WMI command over USB with delay of some > _msec_ not usec. There are two options right now, use workqueue or do > not support sta_rc_update. > Unfortunately not supporting sta_rc_update() means making adhoc mode unusable.. :( Cheers, -- Antonio Quartulli [-- Attachment #2: OpenPGP digital signature --] [-- Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 2014-01-27 19:02 ` [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 Oleksij Rempel 2014-01-27 19:12 ` Antonio Quartulli @ 2014-01-27 22:22 ` Johannes Berg 1 sibling, 0 replies; 3+ messages in thread From: Johannes Berg @ 2014-01-27 22:22 UTC (permalink / raw) To: Oleksij Rempel; +Cc: mail, ath9k-devel, linux-wireless@vger.kernel.org On Mon, 2014-01-27 at 20:02 +0100, Oleksij Rempel wrote: > Hi Johannes, > > i found this bug report with your response: > https://bugzilla.redhat.com/show_bug.cgi?id=990955 > "I don't think adding a workqueue is a good idea because that would > significantly delay the calls in many situations." > > The problem on ath9k_htc I don't care about ath9k_htc much, maybe it should just have a work item for that. I don't like it in mac80211 though, since chips that want to react quickly should be able to. johannes ^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-01-27 19:02 ` [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 Oleksij Rempel
2014-01-27 19:12 ` Antonio Quartulli
2014-01-27 22:22 ` Johannes Berg
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