[haiku-bugs] Re: [Haiku] #8007: [app_server] fully unresponsive when resizing window of big textfile
- From: "jua" <trac@xxxxxxxxxxxx>
- Date: Sun, 04 Mar 2012 09:28:47 -0000
#8007: [app_server] fully unresponsive when resizing window of big textfile
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Reporter: ttcoder | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking: 7882, 8136
Has a Patch: 1 | Platform: All
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Comment (by jua):
Quoting (slightly changed) what I wrote on the mailing list:
> [priority boosting] I think one also has to see the other side: it
already happens implicitly. When a low-priority threads holds a mutex
needed by a high-priority thread it effectively blocks the high-priority
thread from working... all it can do is stall and waste CPU cycles. Even
though there is no explicit priority change, it happens implicitly and
causes freezing.
So in the end, even if the boosting goes on for a year, it would be
justified IMO.
(btw, would kernel mutexes really be used to signal rare events anyway,
instead of, say, semaphores?)
--
Ticket URL: <http://dev.haiku-os.org/ticket/8007#comment:42>
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