Review Request: Do not terminate threads

Albert Astals Cid tsdgeos at terra.es
Thu Aug 4 10:31:31 BST 2011



> On Aug. 4, 2011, 3:19 a.m., Dawit Alemayehu wrote:
> > I do not like this patch for the very reason you stated. I do not want the mutex there either because it is rather expensive. As it stands we start a thread for each lookup right now which in of itself is already too expensive for my taste. Hence, I will have to think of some other way to avoid the even worse solution of creating a local even loop. 
> > 
> > Having said that,  are you using a slow DNS server ? The only way the lookup thread gets terminated is if your nameserver takes longer than 1000 ms per query. That is because the two KUriFilterPlugins that use it set a timeout value of that duration. Otherwise, that code path should not be encountered at all!

So you do not want a patch that fixes konqueror crashing 75% times i use it in exchange of having a small memory leak once in a blue moon? Awesome.
And yes, obviously i have a slow DNS server, otherwise why would i hit that codepath?


- Albert


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On Aug. 2, 2011, 11:30 a.m., Albert Astals Cid wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/102179/
> -----------------------------------------------------------
> 
> (Updated Aug. 2, 2011, 11:30 a.m.)
> 
> 
> Review request for kdelibs and Dawit Alemayehu.
> 
> 
> Summary
> -------
> 
> Each time the terminate code triggers my Konqueror crashes, i'm substituting the terminate for just waiting the thread to finish and we just ignoring it.
> 
> The code has a race condition in which wait() returns false, then we switch to the thread and m_autoDelete is still not set and thus noone will delete the thread. I can add a mutex if you guys think this is unacceptable.
> 
> 
> Diffs
> -----
> 
>   kio/kio/hostinfo.cpp fef39fc 
> 
> Diff: http://git.reviewboard.kde.org/r/102179/diff
> 
> 
> Testing
> -------
> 
> When the 
> kDebug() << "Name look up for" << hostName << "failed";
> if triggers i do not get a crash anymore.
> 
> 
> Thanks,
> 
> Albert
> 
>

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