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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m seeing a kernel oops/ENOMEM errors if the dentry
that was gotten from cache before the call to __realloc_dentry_private_data has
a 0 in the bcount field.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>As far as I can tell if this happens then unionfs thinks
there isn’t any memory and fails out on Mount with a Cannot Allocate
Memory error or it cases a kernel to oops when it’s trying to clean up
crumbs from a unionfs_lookup<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Now for more info I am doing something odd, in that I’m
taking the 2.6.9 Unionfs2 diff and applying it to a 2.6.11 kernel (It seems to
work fine after I initialize that field to 1)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m semi-new to kernel FS development so if you guys
have any thoughts thanks.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><b><font size=2 color=navy face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:navy;font-weight:bold'>Andrew Mellors</span></font></b><font
size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'> <br>
Software Engineer<br>
<b><span style='font-weight:bold'>EMPIRIX</span></b></span></font> <br>
<b><font size=2 color="#ff6600" face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:#FF6600;font-weight:bold'>p:</span></font></b><font
size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'> 781.266.3576<br>
</span></font><b><font size=2 color="#ff6600" face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:#FF6600;font-weight:bold'>email:</span></font></b><font
size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'> <a href="mailto:amellors@empirix.com">amellors@empirix.com</a> <br>
<st1:Street w:st="on"><st1:address w:st="on">20 Crosby Drive</st1:address></st1:Street><b><span
style='font-weight:bold'> </span></b></span></font><font size=2 color="#ff6600"
face=Verdana><span style='font-size:10.0pt;font-family:Verdana;color:#FF6600'>-
</span></font><st1:place w:st="on"><st1:City w:st="on"><font size=2 color=navy
face=Verdana><span style='font-size:10.0pt;font-family:Verdana;color:navy'>Bedford</span></font></st1:City><font
size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'>, <st1:State w:st="on">MA</st1:State> <st1:PostalCode w:st="on">01730</st1:PostalCode></span></font></st1:place><br>
<font size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:
Verdana;color:navy'><a href="http://www.empirix.com"><font color="#000099"><span
style='color:#000099'>http://www.empirix.com</span></font></a> </span></font><font
size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'><o:p></o:p></span></font></p>
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