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<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=178530900-08122009>We are using DRBD
v8.2.6 and recently ran into an issue where the primary and secondary were stuck
in WFBitMapS and WFBitMapT.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=178530900-08122009>We then applied the
following patch:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT size=+0><SPAN class=178530900-08122009><A
href="http://git.drbd.org/?p=drbd-8.2.git;a=commit;h=e350643dd4d42a9b06a28377369d3c6a4c7b61ed">http://git.drbd.org/?p=drbd-8.2.git;a=commit;h=e350643dd4d42a9b06a28377369d3c6a4c7b61ed</A></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=178530900-08122009>which has resolved
the stuck, but now we intermittently see a kernel panic as a result of calling
drbd_send_uuids() within after_state_ch().</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=178530900-08122009>Any help is much
appreciated.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009>Thanks,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009>Ivan</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=178530900-08122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=178530900-08122009><SPAN lang=EN-CA>
<P>Starting DRBD resources: [ d(drbd0) d(drbd1) d(drbd2) d(drbd3) </P>
<P>d(drbd4) CPU 2 Unable to handle kernel paging request at virtual address
000000000000020c, epc == c000000000155b7c, ra == c000000000155b58</P>
<P>Oops[#1]:</P>
<P>Cpu 2</P>
<P>$ 0 : 0000000000000000 0000000010008ce1 00001e0000000000 0000000000000000</P>
<P>$ 4 : 0000000000000004 00000000002d0000 0000000000000000 0000000000000000</P>
<P>$ 8 : c000000000166c68 00000000000001ad 0000000000000005 6475616c706f7274</P>
<P>$12 : a80000041aaebfe0 0000000000008c00 a80000041ac9c000 0000000000000000</P>
<P>$16 : a80000041b242000 a80000041b242000 a80000041b242410 000000000040c200</P>
<P>$20 : 0000000000000000 0000000000000006 0000000000400000 0000000000000000</P>
<P>$24 : 0000000000000002 0000000032a97c90</P>
<P>$28 : a80000041aae8000 a80000041aaebe00 0000000000000000 c000000000155b58</P>
<P>Hi : 0000000000000005</P>
<P>Lo : 00000000001a286d</P>
<P>epc : c000000000155b7c drbd_send_uuids+0x114/0x308 [drbd] Tainted: P</P>
<P>ra : c000000000155b58 drbd_send_uuids+0xf0/0x308 [drbd]</P>
<P>Status: 10008ce3 KX SX UX KERNEL EXL IE</P>
<P>Cause : 00800008</P>
<P>BadVA : 000000000000020c</P>
<P>PrId : 000d030b</P>
<P>Modules linked in: drbd dualport(P) mvsas Process drbd2_worker (pid: 3880,
threadinfo=a80000041aae8000,</P>
<P>task=a80000041b92b340)</P>
<P>Stack : 0016000000000011 b7b65eff4ac5f16a 0000000000000000
e5eb3323fa5f01e2</P>
<P>552aab8b0f461bb2 0000000000000000 0000000000000000 a80000041b242000</P>
<P>0000000000000000 c0000000001579bc 0000000000000000 a80000041b2420e8</P>
<P>a80000041b92b340 a800000411c41370 0000000000000000 ffffffff81143670</P>
<P>0000000000400000 a800000419954300 0000000000400000 000000001b92b340</P>
<P>0000000281409808 00000000812c8b00 a800000419954300 a80000041b242000</P>
<P>a80000041b2420b0 a80000041b2420e8 a80000041aaebf08 a80000041b242520</P>
<P>0000000000000001 0000000000000000 ffffffff81409808 c0000000001298fc</P>
<P>ffffffffffffffff a80000041aaebf08 a80000041aaebf08 ffffffffffffffff</P>
<P>a80000041b2420c0 a80000041b2420f8 0000000000000003 a80000041b242520</P>
<P>...</P>
<P>Call Trace:</P>
<P>[<c000000000155b7c>] drbd_send_uuids+0x114/0x308 [drbd]
[<c0000000001579bc>] w_after_state_ch+0x154/0xf20 [drbd]
[<c0000000001298fc>] drbd_worker+0x73c/0x830 [drbd]
[<c000000000158fb0>] drbd_thread_setup+0x1c0/0x368 [drbd]
[<ffffffff8111d648>] kernel_thread_helper+0x10/0x18</P>
<P> </P>
<P>Code: 0002127c de050000 00c23024 <8ce3020c> 24020001 000212fc 30a54000
00c23026 24020002 Fatal exception: panic in 5
seconds</P></SPAN></SPAN></FONT></DIV></BODY></HTML>