On Wed, 17 May 2000, Jeff Garzik wrote:
> David Weinehall wrote:
> > > To Do
> > > -----
> > > Loopback fs hangs
> >
> > Definitely show-stopper. Almost every distro (if not every) uses Loopback
> > for their installers, and Loopback is used for a lot of other things too.
>
> Are we talking about a loopback filesystem, or the loopback block
> device? Andries' patch for the loopback block device made it into a
> recent 2.3.x kernel.
>
>
>
> So, maybe these two items can be crossed off, after testing?
/dev/loop is busted, and not only wrt lockup. I used to be able to
beat on it _hard_ if I prevented plugging. Now, it doesn't seem to
be reading correctly (cpp gripes on simple compile attempt) and disk
io (iozone/bonnie) blows up the kernel quite spectacularly. The last
few entries of the longest (kdb) stack trace I've ever seen goes..
kernel_thread
bdflush+0x6d
flush_dirty_buffers+0x84
... ~100 lines of processing loop device requests
do_try_to_free_pages+0x39
shrink_mmap+0xa0
try_to_free_buffers+0x149
sync_page_buffers+0x2f
ll_rw_block+0x16
__ll_rw_block+0x146
generic_make_request+0x5ed
__get_request_wait+0x279
schedule+0x2a
BUG at sched.c:445
..and is repeatable.
-Mike
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This archive was generated by hypermail 2b29 : Tue May 23 2000 - 21:00:14 EST