[haiku-bugs] Re: [Haiku] #5611: Impossible to terminate a blocked process
- From: "stippi" <trac@xxxxxxxxxxxx>
- Date: Sun, 21 Mar 2010 19:21:56 -0000
#5611: Impossible to terminate a blocked process
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Reporter: fano | Owner: nobody
Type: bug | Status: new
Priority: high | Milestone: R1
Component: - General | Version: R1/alpha1
Keywords: | Blockedby:
Platform: All | Blocking:
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Comment(by stippi):
It depends of course how the application is blocked. Here you have
experienced the same block in two different applications, because you were
testing playback from UDF mounts. Usually, blocked processes can be killed
just fine, but there are certain types of blocks in ther kernel, which
make killing impossible. This results from a bug in a kernel component,
most likely the UDF add-on, and does not represent the average blocked
process.
AFA automatic detection of hanged processes goes... this is possible to
implement. One way to do it is to regularily ping the application thread
(perhaps all window threads as well) with messages that have an expected
reply timeout. Also, app_server could expect a reply for the quit message
that it sends when the user presses the window close button. If a reply
does not arrive within a certain timeout, it could offer to kill the team.
Some programs could need to be updated, though, since they may do stuff
that appears as blocking, like asking the user to save changes, the user
could be navigating a file dialog to save his work, it would be irritating
to popup an alert asking to force kill the app right then...
--
Ticket URL: <http://dev.haiku-os.org/ticket/5611#comment:1>
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