gmirror crash writing to disk? Or is it su+j crash?

[Edward Tomasz Napierała]

Wiadomość napisana przez Zaphod Beeblebrox <zbeeble at gmail.com> w dniu 29 sie 2013, o godz. 23:35:
> So I have a system running:
> 
> FreeBSD walk.dclg.ca 9.2-RC3 FreeBSD 9.2-RC3 # r254952: Wed Aug 28 03:02:55
> EDT 2013     root at walk.dclg.ca:/usr/obj/usr/src/sys/STRIKE  i386
> 
> and it has two 2T SATA disks.  To keep this post short, the crash.txt is
> here.
> 
> https://uk.eicat.ca/owncloud/public.php?service=files&t=fea9d25579fe0c4afb808859e80e1493

Login error.

> now curiously, while running a "make -j4 buildkernel" ... almost every time
> ... it crashes with:
> 
> g_vfs_done():mirror/walke[WRITE(offset=516764794880, length=65536)]error =
> 11
> /usr: got error 11 while accessing filesystem
> panic: softdep_deallocate_dependencies: unrecovered I/O error

This is softupdates panic caused by write operation returning error 11, which,
according to 'man errno', is EDEADLK.

To be honest, I have no idea why gmirror might be returning this error.

> ... no error report from the hard drives, simply an error report from the
> mirror.

Note that ahci(4) does not log errors unless you're running with bootverbose.

> The filesystem is ufs with su+j... but I'm not sure this matters here.

It does, kind of - without soft updates/SUJ, the error would be non-fatal - it
wouldn't panic the box, but it would (probably) cause data corruption.