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<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Folks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>I am seeing a drbdd oops almost exact in nature to the one
below, certainly looks like memory corruption. It is happening in the same
spot (drbd_end_req()).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Because this is happening somewhat consistently within the
drbd subsystem and no where else, I wonder if the corruption is coming from
within drbd? Was this issue ever resolved?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>I am using drbd version 0.6.12, has anyone seen this problem
with newer versions of drbd?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Regards!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>From: Philipp Reisner <<a
href="http://gmane.org/get-address.php?address=philipp.reisner%2d63ez5xqkn6DQT0dZR%2bAlfA%40public.gmane.org"
target="_top">philipp.reisner@...</a>><br>
Subject: <a
href="http://news.gmane.org/find-root.php?message_id=%3c200407021711.42767.philipp.reisner%40linbit.com%3e"
target="_top">Re: [DRBD-user] "syncer" crash when doing full resync</a><br>
Newsgroups: <a href="http://news.gmane.org/gmane.comp.linux.drbd" target="_top">gmane.comp.linux.drbd</a><br>
Date: Fri, 02 Jul 2004 17:11:42 +0200<o:p></o:p></span></font></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>[...OOPS deleted...]<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>> ohwell :(<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>After finding time to analyze this problem it is clear that the <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>peer sent an invalid response-cookie, which caused this node to crash.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>We understand what happened there:<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;background:
#FFFF66;font-weight:bold'>drbdd</span></font></b><o:p></o:p></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> -> receive_block_ack<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> -> drbd_end_req<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> -> struct Drbd_Conf* mdev = drbd_conf + MINOR(req->bh->b_rdev);<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> ^^^^^^^^^^<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>The crash happens while dereferencing req->bh<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>The register holding req (%esi) has 0xffffffff .<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>This req comes from the peer, it got it with the request to write a block.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Either your peer is corrupting its memory (more probabely), or <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>the node, on which the OOPS happened is corrupting its memory (less<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>probabel)<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Please go and get new hardware.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>[In case memtest86 does not find anything, it could be that the <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> IO operation to disk does the memory corruption...]<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-philipp<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>: Dipl-Ing Philipp Reisner Tel +43-1-8178292-50 :<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>: Schönbrunnerstr 244, 1120 <st1:place
w:st="on"><st1:City w:st="on">Vienna</st1:City>, <st1:country-region w:st="on">Austria</st1:country-region></st1:place> <a
href="http://www.linbit.com" target="_top">http://www.linbit.com</a> :<o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><script>
document.domain = 'gmane.org';
document.title = 'Re: DRBD user syncer crash when doing full resync';
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