First of all, Thanks Theodore. On Oct 21 2008, Theodore Tso wrote: > On Tue, Oct 21, 2008 at 08:15:10AM -0200, Rogério Brito wrote: > > Did you sync the device? From the message, it seems that some data were > > to be written to the device, but the device was already gone by that > > time, but I'm not a specialist on the filesystem subsystem and perhaps > > others could say more about it. > > A patch to suppress the WARN information will be in 2.6.28 when the > user does something stupid (i.e., yank out a USB stick without > unmounting the filesystem first).
Right. I will put a big, fat warning on the installation of usbmount and tell the users about it. Besides that, depending on the filesystem, the superblock may be marked as dirty. > This was done mainly to suppress the "scary message" in dmesg, which on > distributions that support uploading such messages to > http://www.kerneloops.org for analysis, was cluttering the reports. Right... > > > > [39071.160167] Buffer I/O error on device sda1, logical block 1545 > > > > [39071.160170] lost page write due to I/O error on sda1 > > > > [39071.160184] Buffer I/O error on device sda1, logical block 1545 > > > > [39071.160187] lost page write due to I/O error on sda1 > > These errors you'd still get, since these messages are the sound of > users' data being irretrivably being lost. Good that not all messages will be going... BTW, this reminded me of a patch that eliminated a whole lot of messages (BUG()'s) for embedded devices... I didn't find it anymore... Also, the same thing with the hash tables that could turn into linked lists eventually... But I'm drifting away from the main topic. > > Well, it is a bug. It just needs more investigation to see where the bug > > lies. > > I don't know if you would call it a bug or not. Fundamentally, > yanking out a USB stick without unmounting it first is dangerous, and > can lead to data loss. At least sync'ing... [snip] > If you see "lost page write due to I/O error", then you will have lost > data due to premature removal of the USB stick, and fundamentally > *that* bug exists between the keyboard and the chair. Ok, so I'm closing this bug in the next upload. Thanks, Rogério Brito. -- Rogério Brito : [EMAIL PROTECTED],ime.usp}.br : GPG key 1024D/7C2CAEB8 http://www.ime.usp.br/~rbrito : http://meusite.mackenzie.com.br/rbrito Projects: algorithms.berlios.de : lame.sf.net : vrms.alioth.debian.org -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
