Well-Known PRs as determined by the bugbusting team

Date generated: Sat Nov  7 07:25:01 2009 GMT


<p>
This is a list of PRs that the bugbusting team has determined are
commonly reported problems.  By grouping them together by symptom,
we hope to attract more attention to them.  It is generated from
<a href="http://people.freebsd.org/~linimon/wellknown.prs">this file</a>
once per day.
</p>

<p>
This list is similar to the
<a href="http://people.freebsd.org/~linimon/studies/prs/recommended_prs.html">
recommended list</a>, which contains PRs that have a patch and are ready to go.
</p>

<p>
See also the
<a href="http://wiki.freebsd.org/JeremyChadwick/Commonly_reported_issues">
Commonly Reported Issues list</a> on the wiki.
</p>

<p>
Send comments to linimon@FreeBSD.org.
</p>

<p>
Note: closed PRs will be automagically filtered out.
</p>

<!-- NOTE: begin index (must be maintained manually for now) -->
<a href="#Ejecting_mounted_device_causes_panic">
Ejecting mounted device causes panic</a>
<br>

<a href="#Mounting_something_twice_hangs_system">
Mounting something twice hangs system</a>
<br>

<a href="#Mounting_write-protected_media_panics_system">
Mounting write-protected media panics system</a>
<br>

<a href="#sysinstall_will_not_unmount_CDs">
sysinstall will not unmount CDs</a>
<br>

<a href="#UDF_filesystems_unmountable">
UDF filesystems unmountable</a>
<br>

<a href="#Unexpected_panic_on_device_insert">
Unexpected panic on device insert</a>
<br>

<a href="#Panic_on_insert_and_removal">
Unexpected panic on device insert and removal (even if not mounted)</a>
<br>

<!-- NOTE: end index (must be maintained manually for now) -->

<!-- MCL 20080524 -->
<h3>Ejecting mounted device causes panic</h3>
<a name="Ejecting_mounted_device_causes_panic">
<p>
This is the most notorious problem.  In general it affects users of USB
devices the most often, but can also affect CD and floppy users.  The
'received wisdom' is that the VM system will need some re-architecting
to fully cope with this problem.
</p>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
o usb/73307    usb        [panic] Kernel panics on USB disconnect
o kern/87859   fs         [smbfs] System reboot while umount smbfs.
o kern/94669   pjd        [vfs] [patch] Panic from Failed Removable Media Mount
o kern/96644              [panic] umount(8) crash after mount/umount disturbance
f usb/104292   gavin      [usb67] [umass] [hang] system lockup on forced umount 
o usb/105361   usb        [usb67] [panic] Kernel panic during unmounting mass st
o kern/108968             [panic] Double mount then umount and ls resuits in pan
o kern/109377  daichi     [unionfs] unionfs crashes if underlying file system fo
f usb/112631   gavin      [usb67] [panic] Problem with SONY DSC-S80 camera on um
o usb/115298   usb        [ulpt] [panic] Turning off USB printer panics kernel
o usb/120786   usb        [usb] [panic] Kernel panic when forced umount of a det

11 problems total.

<!-- MCL 20080524 -->
<a name="Mounting_something_twice_hangs_system"</a>
<h3>Mounting something twice hangs system</h3>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
a kern/74809              [modules] [panic] smbfs panic if multiply mounted
o kern/89396              [reboot] remounting cdrom causes reboot
p kern/106496  kris       [softupdates] Can't remount filesystem as read only af
o kern/107285             [panic] freeze and reboot by mounting CDROM volume twi

4 problems total.

<!-- MCL 20080524 -->
<a name="Mounting_write-protected_media_panics_system"</a>
<h3>Mounting write-protected media panics system</h3>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
o usb/74771    usb        [umass] [hang] mounting write-protected umass device a
o kern/94838   scsi       Kernel panic while mounting SD card with lock switch o

2 problems total.

<!-- MCL 20080524 -->
<a name="sysinstall_will_not_unmount_CDs"</a>
<h3>sysinstall will not unmount CDs</h3>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
o bin/122522   kensmith   sysinstall(8) doesn't unmount CD for multi-CD package 

1 problem total.

<!-- MCL 20080524 -->
<a name="UDF_filesystems_unmountable"</a>
<h3>UDF filesystems unmountable</h3>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
o kern/120989  scottl     [udf] [patch] UDF (with DVD RAM) isn't mountable/reada

1 problem total.

<!-- MCL 20080524 -->
<a name="Unexpected_panic_on_device_insert"</a>
<h3>Unexpected panic on device insert</h3>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
f usb/101752   gavin      [usb67] [umass] [panic] 6.1-RELEASE kernel panic on Ca
o usb/105361   usb        [usb67] [panic] Kernel panic during unmounting mass st
o usb/114310   usb        [libusb] [patch] [panic] USB hub attachment panics ker
o usb/117313   usb        [umass] [panic] panic on usb camera insertion
o usb/117955   usb        [umass] [panic] inserting minolta dimage a2 crashes OS
o usb/123690   usb        [usb] [panic] Panic on USB device insertion when usb l
o usb/126519   usb        [usb] [panic] panic when plugging in an iphone
o usb/129500   usb        [umass] [panic] FreeBSD Crashes when connecting SanDis
o usb/129766   usb        [usb] plugging in usb modem HUAWEI E226 panics system

9 problems total.

<!-- MCL 20081224 -->
<a name="Panic_on_insert_and_removal"></a>
<h3>Unexpected panic on device insert and removal (even if not mounted)</h3>

S Tracker      Resp.      Description
--------------------------------------------------------------------------------
o usb/77184    usb        [umass] [panic] kernel panic on USB device disconnect,
o usb/79269    usb        [ohci] USB ohci da0 plug/unplug causes crashes and loc
s usb/82569    usb        [umass] [panic] USB mass storage plug/unplug causes sy
o usb/83563    usb        [umass] [panic] Page Fault while detaching Mpman Usb d
s usb/84336    usb        [usb] [reboot] instant system reboot when unmounting a
o usb/92171    usb        [panic] panic unplugging Vodafone Mobile Connect (UMTS
o usb/94897    usb        [panic] Kernel Panic when cleanly unmounting USB disk
o usb/118098   usb        [umass] 6th gen iPod causes problems when disconnectin
o usb/121232   usb        [usb] [panic] USB CardBus card removal causes reboot s
o usb/121755   usb        [ohci] [patch] Fix panic after ohci/uhub cardbus devic
o usb/124980   usb        [panic] kernel panic on detaching unmounted umass devi
o kern/124996             [patch] "filesystem goof: vop_panic[vop_revoke]" panic
o usb/125450   usb        [panic] Removing USB flash card while being accessed c
f kern/125985             [umass] [panic] no da-device, panic upon unplugging

14 problems total.