Hello all,<div><br></div><div>We have been running lustre for almost a month with no problems, however, about a week ago while running our application we encountered the following LBUG:</div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><div>
<br></div><div>Sep 14 14:08:20 max13 kernel: LustreError: 12346:0:(rw.c:1948:ras_stride_increase_window()) ASSERTION(ras->ras_window_start + ras->ras_window_len >= ras->ras_stride_offset) failed: window_start 34816, window_len 0 stride_offset 34825</div>
<div>Sep 14 14:08:20 max13 kernel: LustreError: 12346:0:(rw.c:1948:ras_stride_increase_window()) LBUG</div><div>Sep 14 14:08:20 max13 kernel: Lustre: 12346:0:(linux-debug.c:264:libcfs_debug_dumpstack()) showing stack for process 12346</div>
<div>Sep 14 14:08:20 max13 kernel: stepcrsgs R running task 0 12346 12344 12452 (NOTLB)</div><div>Sep 14 14:08:20 max13 kernel: 0000000000000020 0000000000000001 0000000500000000 0000000000000001</div>
<div>Sep 14 14:08:20 max13 kernel: 0000000000000092 ffffffff80047152 3830303437313532 ffffffff801bf903</div><div>Sep 14 14:08:20 max13 kernel: 0000000500000000 0000000000000000 0000000000000011 0000000000000096</div><div>
Sep 14 14:08:20 max13 kernel: Call Trace:</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff801bf903>] serial8250_console_putchar+0x3f/0xa5</div><div>Sep 14 14:08:20 max13 last message repeated 2 times</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff80091d2d>] printk+0x52/0xbd</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff80091d2d>] printk+0x52/0xbd</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff800a74cd>] get_symbol_offset+0x1d/0x3c</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff800a7b2e>] kallsyms_lookup+0xe6/0x1ae</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff80091c8f>] vprintk+0x2cb/0x317</div><div>Sep 14 14:08:20 max13 last message repeated 3 times</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8006bc3b>] printk_address+0x9f/0xab</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff80064b50>] _spin_unlock_irqrestore+0x8/0x9</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff800a54d2>] module_text_address+0x33/0x3c</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8009e65b>] kernel_text_address+0x1a/0x26</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff8006b921>] dump_trace+0x206/0x22f</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8006b97e>] show_trace+0x34/0x47</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8006ba83>] _show_stack+0xdb/0xea</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff88740b1a>] :libcfs:lbug_with_loc+0x7a/0xd0</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff88a8061f>] :lustre:ll_readpage+0x129f/0x1e40</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8000c6dd>] add_to_page_cache+0xaa/0xc1</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff8000c2cb>] do_generic_mapping_read+0x208/0x354</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8000d0b6>] file_read_actor+0x0/0x159</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8000c563>] __generic_file_aio_read+0x14c/0x198</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff800c5be8>] generic_file_readv+0x8f/0xa8</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff800a00be>] autoremove_wake_function+0x0/0x2e</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff88a8d3b7>] :lustre:our_vma+0x117/0x1d0</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff8000b984>] touch_atime+0x67/0xaa</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff88a5263b>] :lustre:ll_file_readv+0x1e4b/0x2130</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff80045d65>] do_sock_read+0xcf/0x110</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff88a5293a>] :lustre:ll_file_read+0x1a/0x20</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff8000b695>] vfs_read+0xcb/0x171</div><div>Sep 14 14:08:20 max13 kernel: [<ffffffff80011b35>] sys_read+0x45/0x6e</div>
<div>Sep 14 14:08:20 max13 kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0</div><div>Sep 14 14:08:20 max13 kernel:</div><div>Sep 14 14:08:20 max13 kernel: LustreError: dumping log to /tmp/lustre-log.1284466101.12346</div>
<div><br></div><div>Due to the distributed nature of the application it has been difficult/impossible to reproduce this.</div></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; border-collapse: collapse; "><br>
</span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; border-collapse: collapse; ">Has anyone else experienced this or know if a) this has been fixed in a newer version of Lustre or b) how I can go about providing enough information to document this bug?</span></div>
<div><font class="Apple-style-span" face="arial, sans-serif"><span class="Apple-style-span" style="border-collapse: collapse;">I would prefer not to upgrade Lustre as this version has been working very well with our current application.</span></font></div>
<div><font class="Apple-style-span" face="arial, sans-serif"><span class="Apple-style-span" style="border-collapse: collapse;"><br></span></font></div><div><font class="Apple-style-span" face="arial, sans-serif"><span class="Apple-style-span" style="border-collapse: collapse;">Thanks,</span></font></div>
<div>Ashley Nicholls<br><br>
</div>