Jan Kara <[email protected]> wrote:
>
> > Just hit our main server, while doing kernel compile
> > (producing a .deb using custom script which does quite
> > some usage of symlinks - hence sys_symlink() operation
> > is in call trace) -- that particular filesystem stopped
> > working, while the rest of the system was still operational.
> >
> > It's 2.6.15.1 kernel running on an athlon-1.3GHz, pretty
> > old but pretty stable box, with ECC memory. The filesystem
> > in question is on top of a raid0 array out of 4 scsi drives
> > (it's used as a "staging area" for various temporary stuff,
> > incl. compiles and whatnot).
> >
> > Any clues about this one?
> >
> > Note it's the first time I encountered an error like this
> > one, but I did quite alot of kernel compiles on this box
> > already since last boot (I'm experimenting with Xen on
> > another box, this box is used as a "compiling server").
> > So I can hardly say the problem is "easily reproduceable".
> The trace you provided is good enough so that I don't need to
> reproduce the problem :). The bug is in ext3 - the problem is that we
> start a transaction and then do something that needs to allocate memory
> but we don't set GFP_NOFS. As we are low on memory we try to shrink
> caches and remove some inode on different filesystem from memory. We
> recurse back into the fs code which finds out we have already started
> transaction on different fs and BUGs.
> The right solution probably is to pass gfp flags to page_symlink().
> I'll write a patch.
That'd be the safest approach. It'd be nicer to close off the transaction
while running page_symlink(), although we'd need to think hard about the
atomicity implications of that.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
