[haiku-bugs] Re: [Haiku] #10522: Assert failed in TrashWatcher
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Sun, 09 Feb 2014 22:41:18 -0000
#10522: Assert failed in TrashWatcher
-----------------------------+----------------------------
Reporter: kallisti5 | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords: vfs
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by bonefish):
The vnode in question is the root node of a packagefs:
{{{
kdebug> mounts
address id root covers cookie
fs_name
...
0xffffffff8aa2cda8 9 0xffffffff92edb380 0xdeadbeefdeadbeef
0xffffffff8f842178 packagefs
}}}
The "covers" field would normally suggest that the mount has already been
deleted, but the other fields aren't 0xdeadbeef (and look quite plausible
even), which they would be in that case. Moreover, the mount wouldn't be
in the mounts hash table anymore and thus wouldn't be listed by `mounts`.
Given that "covers" (like "root") is an immutable field (initialized when
mounting and never modified afterward), it's a bit of a mystery how it can
get that value.
The root node is not in the mount's vnode list, which is at least
consistent with it's ref count. Though, obviously, that should never
happen. The root node is kept until unmounting.
It would be interesting to know whether another thread is currently
performing a mount/unmount operation
--
Ticket URL: <https://dev.haiku-os.org/ticket/10522#comment:4>
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