HP-UX: 在HP-UX 10.20上安装Oracle 7.3.3版时挂起。
我使用运行HP-UX 10.20的9
。
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000/K，我试图在上面安装Oracle 7.
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3.3版，但安装挂起，我们找不到原因
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问题是由于在PA8000系统上
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使用VxFS Direct IO和SHMEM_MAGIC
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时的死锁引起的。
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| 使用下面的方法禁用superpage exec(): |
缺陷实际上在VxFS代码中。
检查UIOSEG_PAGEIN IO，然后有
exec_superpage_text()，从而
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VX_DIRECT IO特性的设计只适用于用
可能在保持区域RW锁定的同时，调用
导致到达useracc()/pfault()/findp
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户IO (UIOSEG_USER)，问题在于VxFS不
vx_dio_iovec()/vx_memiolock()及
reg()/lock_write()时出现死锁：
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| findpreg+0xb0 <<< 再次调用 reglock()!!! |
| vx_read1+0x2e4 <<< 调用 vx_dio_check() |
| vn_rdwr+0x8c <<< UIOSEG_PAGEIN |
| exec_superpage_text+0x168 <<< 调用 reglock() |
解决方法是将vx_dio_check()中的EINVAL返回
通道，从而避免死锁。
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non-UIOSEG_USER段的IO，然后vx_read1()将返回标准IO
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.........following with all English text
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....
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A4747242 [A4747242/TRAK/
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English]
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HP-UX: Installation of Oracle release 7.
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3.3 hangs with HP-UX 10.20.
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I have a 9000/K with HP-
The installation hangs and w
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UX 10.20 on which I am trying to
e cannot find the cause.
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install Oracle release 7.3.3.
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The problem is caused by
systems.
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a deadlock when using VxFS Dire
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ct IO and SHMEM_MAGIC on PA8000
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Use this work-around to
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disable superpage exec():
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| The work-around should solve the problem. |
The defect is actually in the VxFS code.
for user IOs only(UIOSEG_USER). The problem
IOs. It is then possible to call vx_dio_iove
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The VX_DIRECT IO feature is designed to work
is that VxFS does not check for UIOSEG_PAGEIN
c()/vx_memiolock() along the exec_superpage_text()
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while holding the region RW lock, thus r
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esulting in a deadlock when
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reaching useracc()/pfaul
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t()/findpreg()/lock_write():
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| findpreg+0xb0 <<< calling reglock() again !!! |
| vx_read1+0x2e4 <<< called vx_dio_check() |
| vn_rdwr+0x8c <<< UIOSEG_PAGEIN |
| exec_superpage_text+0x168 <<< called reglock() |
The fix would be to retu
segments. Then vx_read1() w
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rn EINVAL in vx_dio_check() for
ould fall-back to the
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IOs with non-UIOSEG_USER
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regular IO path and this would avoid the
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deadlock.
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SR 1653223669 has been o
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pened for this problem.
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