On Dec 5, 2006, at 9:13 AM, Jürgen Keil wrote:
That explains the timeouts you're seeing. As I stated in a previous
note UFS has extremely poor performance when it comes
to large files.
Huh? I would have expected that the explanation for the iscsi
initiator
timeouts is that iscsitgtd has crashed.
I made the assumption, a false one from looking at the backtrace,
that I/O was occurring to the device. When thick_provo_start() is
running the device is marked as offline so that initiator can't do
anything other than send a REPORT_LUN command to the device.
I'll have to look at that offset and find out what's happening. That
should be easy to trace.
It seems to crash because it has corrupted it's malloc heap:
% mdb - core-iscsitgt
Loading modules: [ libumem.so.1 libavl.so.1 libc.so.1 libnvpair.so.
1 libuutil.so.1 ld.so.1 ]
$c
libc.so.1`_lwp_kill+0xa()
libc.so.1`raise+0x19()
libumem.so.1`umem_do_abort+0x1c()
libumem.so.1`umem_err_recoverable+0xc9()
libumem.so.1`process_free+0x199()
libumem.so.1`free+0x16()
thick_provo_start+0x215()
libc.so.1`_thr_setup+0x67()
libc.so.1`_lwp_start()
::umem_status
Status: ready and active
Concurrency: 4
Logs: (inactive)
Message buffer:
free(485bb1): invalid or corrupted buffer
stack trace:
libumem.so.1'_PROCEDURE_LINKAGE_TABLE_+0x867
libumem.so.1'valloc+0x1b9
libumem.so.1'free+0x16
iscsitgtd'thick_provo_start+0x215
libc.so.1'_thr_slot_offset+0x327
libc.so.1'_thr_slot_offset+0x5d0
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