[haiku-bugs] Re: [Haiku] #9377: Network Stack Deadlock
- From: "axeld" <trac@xxxxxxxxxxxx>
- Date: Sun, 03 Feb 2013 12:38:55 -0000
#9377: Network Stack Deadlock
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Reporter: jackburton | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Network & Internet/Stack | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by axeld):
That does not work, unfortunately.
First of all, a second get_interface() for the same name might return an
invalid interface (ie. one that hasn't been completely initialized), or
CreateDomainDatalinkIfNeeded() might be called twice.
Second of all, if you do not acquire a reference before losing the lock,
the interface might be deleted by someone else before you do.
In general, I think the locking order "all interfaces" -> "single
interface" is more natural than the other way around. Maybe `SetDown()`
can be changed to not hold the interface lock when calling into the
interface code. If that isn't possible at all (I don't remember), another
way would be to lock the interfaces lock, too (in the right order).
--
Ticket URL: <http://dev.haiku-os.org/ticket/9377#comment:5>
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