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<div style="font-size: 16px;"><span style="background-color: window; line-height: 19px;">1. When all paths fail,
</span><font size="2" style="background-color: window; font-size: 16px;">reinstate_path and fail_path
<span style="line-height: 18px; widows: 1;">frequently</span><span style="line-height: 18px; widows: 1;"> </span><span style="line-height: 18px; widows: 1;">switch, </span></font><span style="font-size: medium; background-color: window; line-height: 19px; widows: 1;">so
a previously failed path is automatically </span><span style="font-size: medium; background-color: window; line-height: 19px; widows: 1;">reinstated,</span></div>
<div><span style="font-size: 14px; background-color: rgba(0, 0, 0, 0); line-height: 1.5;">
</span><span style="line-height: 1.5;"><font size="3"><span style="background-color: rgb(255, 255, 255);"> </span> </font></span><font size="3"><span style="line-height: 21px;">Could someone tell me why is that</span><span style="line-height: 21px;">? moreover,
</span></font><span style="background-color: rgba(0, 0, 0, 0); font-size: 16px; line-height: 1.5;">dm_reinstate_path not being called in </span><span style="font-size: medium; line-height: 21px; background-color: window;">multipathd.</span></div>
<div><span style="font-size: small; line-height: 19px;"><br>
</span></div>
<div><font size="2">Mar 2 16:06:50 cvknode129 kernel: [68389.817587] sd 3:0:0:0: rejecting I/O to offline device
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817598] device-mapper: multipath: Failing path 8:16. 3483
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817601] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G OE 4.1.0-generic #2
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817602] Hardware name: HP ProLiant BL460c Gen8, BIOS I31 02/25/2012
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817603] ffff880816673500 ffff88081be8bd08 ffffffff817e8924 0000000000000007
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817605] ffff880816673528 ffff88081be8bd38 ffffffffc019c75e 00000000fffffffb
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817607] ffff88003698b458 ffff880816673500 0000000000000010 ffff88081be8bd88
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817609] Call Trace: <br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817612] [<ffffffff817e8924>] dump_stack+0x45/0x57
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817622] [<ffffffffc019c75e>] fail_path+0x7e/0xf0 [dm_multipath]
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817624] [<ffffffffc019d60e>] multipath_end_io+0x5e/0x190 [dm_multipath]
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817627] [<ffffffff81020e19>] ? sched_clock+0x9/0x10
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817629] [<ffffffff81666cf3>] dm_softirq_done+0xd3/0x250
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817642] [<ffffffff81015686>] ? __switch_to+0x1e6/0x580
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817645] [<ffffffff81397d9b>] blk_done_softirq+0x7b/0x90
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817647] [<ffffffff810820fe>] __do_softirq+0xde/0x2d0
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817649] [<ffffffff81082310>] run_ksoftirqd+0x20/0x60
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817650] [<ffffffff810a0fd6>] smpboot_thread_fn+0x116/0x170
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817652] [<ffffffff810a0ec0>] ? sort_range+0x30/0x30
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817653] [<ffffffff8109db59>] kthread+0xc9/0xe0
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817655] [<ffffffff8109da90>] ? flush_kthread_worker+0x90/0x90
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817657] [<ffffffff817f0ca2>] ret_from_fork+0x42/0x70
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.817658] [<ffffffff8109da90>] ? flush_kthread_worker+0x90/0x90
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843090] CPU: 3 PID: 43112 Comm: multipath Tainted: G OE 4.1.0-generic #2
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843092] Hardware name: HP ProLiant BL460c Gen8, BIOS I31 02/25/2012
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843093] ffff880816673528 ffff8807efcdfb78 ffffffff817e8924 ffff88081952e580
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843095] 0000000000000000 ffff8807efcdfbc8 ffffffffc019e20e 0000000000000000
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843097] ffff880036a81440 0000000000000008 ffff88081a288e78 ffffc90006d49040
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843098] Call Trace: <br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843101] [<ffffffff817e8924>] dump_stack+0x45/0x57
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843106] [<ffffffffc019e20e>] reinstate_path+0xae/0x1a0 [dm_multipath]
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843108] [<ffffffffc019e160>] ? multipath_map+0x20/0x20 [dm_multipath]
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843113] [<ffffffffc019d9ce>] multipath_message+0x18e/0x360 [dm_multipath]
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843115] [<ffffffff8166dbc5>] target_message+0x255/0x340
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843116] [<ffffffff8166d970>] ? __dev_status+0x150/0x150
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843118] [<ffffffff8166ef7a>] ctl_ioctl+0x24a/0x520
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843120] [<ffffffff8166f263>] dm_ctl_ioctl+0x13/0x20
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843122] [<ffffffff812142d6>] do_vfs_ioctl+0x86/0x530
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843124] [<ffffffff8106a10f>] ? __do_page_fault+0x1af/0x470
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843126] [<ffffffff81214811>] SyS_ioctl+0x91/0xb0
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843128] [<ffffffff817f0872>] system_call_fastpath+0x16/0x75
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843255] sd 5:0:0:0: rejecting I/O to offline device
<br>
Mar 2 16:06:50 cvknode129 kernel: [68389.843266] device-mapper: multipath: Failing path 8:48. 3514 </font><br>
</div>
<div><font size="2"><br>
</font></div>
<div><font size="2"><br>
</font></div>
<div><font size="2"><br>
</font></div>
<div>
<div><font size="2">device { <br>
vendor "MacroSAN" <br>
product "LU" <br>
path_grouping_policy "group_by_prio" <br>
path_checker "tur" <br>
features "1 queue_if_no_path" <br>
hardware_handler "0" <br>
prio "alua" <br>
failback 15 <br>
rr_weight "priorities" <br>
no_path_retry 30 <br>
rr_min_io 1000 <br>
} <br>
</font></div>
<div><br>
</div>
<div><font size="2">3600b34223c09334d0467dfcd5d0000da dm-0 MacroSAN,LU <br>
size=50G features='0' hwhandler='0' wp=rw <br>
|-+- policy='round-robin 0' prio=50 status=active <br>
| `- 5:0:0:0 sdd 8:48 active ready running <br>
`-+- policy='round-robin 0' prio=10 status=enabled <br>
`- 3:0:0:0 sdb 8:16 active ready running <br>
</font></div>
</div>
<div><font size="2"><br>
</font></div>
<div>
<div style="font-size: 14px; line-height: 21px;">Thanks!</div>
<div style="font-size: 14px; line-height: 21px;"> </div>
<div style="font-size: 14px; line-height: 21px;">Best regards!</div>
</div>
<div><font size="2"><br>
</font></div>
<hr style="width: 210px; height: 1px;" color="#b5c4df" size="1" align="left">
<div><span>
<div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt">
<div>zhangguanghui</div>
</div>
</span></div>
<blockquote style="margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em;">
<div>
<div class="FoxDiv20160302162246612520">
<p></p>
</div>
</div>
</blockquote>
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