Messages in this thread | | | Subject | Re: [hrtimers] Re: Regression affecting b43 LP-PHY card | From | John Stultz <> | Date | Tue, 10 May 2011 12:06:41 -0700 |
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On Tue, 2011-05-10 at 20:57 +0200, Rafał Miłecki wrote: > W dniu 10 maja 2011 00:52 użytkownik Rafał Miłecki <zajec5@gmail.com> napisał: > > In this situation we decided to bisect. I was a little afraid of last > > merges so we took older 2.6.38 as GOOD (we tested this twice) and > > wireless-testing commit before my ssb changes as BAD. Today Juan > > finished bisecting kernel: > > http://pastebin.com/HSKbRzpB > > > > According to his bisection the first bad commit is > > e06383db9ec591696a06654257474b85bac1f8cb [0]: > > hrtimers: extend hrtimer base code to handle more then 2 clockids > > > > Does it make any sense to you? Could this be some timing issue? > > > > It was too late to test this today, we (Juan) will work on this > > tomorrow. It's impossible to revert this commit from HEAD of > > wireless-testing, so my idea is to checkout commit, test, revert, > > test. > > > > Did anyone else experience any similar problems with latest wireless-testing? > > > > > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e06383db9ec591696a06654257474b85bac1f8cb > > Today Juan checkouted commit e06383db9ec591696a06654257474b85bac1f8cb > and tested it. He was disconnected really soon. > > Then he reverted e06383db9ec591696a06654257474b85bac1f8cb and tested > again. Connection was stable, he downloaded 2GB file over network. > > > John S.: your commit does not touch Broadcom card directly, but it > seems it somehow affects it. I suspect there can be some timing issue. > Do you have any idea what could it be, how can we debug this?
Sorry for the trouble!
My commit exposed a few spots where hrtimers were being initialized before hrtimer_init is called, which caused problems. Thomas provided a solution that makes such behavior still function ok: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ce31332d3c77532d6ea97ddcb475a2b02dd358b4
Let me know if the issue is still reproducible with Linus' latest git tree.
thanks -john
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