Messages in this thread | | | Date | Fri, 14 Nov 2008 12:50:31 -0500 | From | Christoph Hellwig <> | Subject | Re: kernel BUG at fs/buffer.c:471! with 2.6.27.6 |
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On Fri, Nov 14, 2008 at 12:24:19PM +0000, Alessandro Bono wrote: > Hi all > > second time I hit this bug, first time with 2.6.26.6 (reported to xfs ml > without response) > Condition are similar: rsync from remote server via ssh to a local usb hd > with a xfs filesystem but connection this time is with a wired ethernet > not wifi > Tell me if you need other info > > kernel BUG at fs/buffer.c:471!
In 2.6.27.6 line 471 in fs/buffer.c is inside write and looks like this:
first = page_buffers(page)
and page_buffers is defined as:
#define page_buffers(page) \ ({ \ BUG_ON(!PagePrivate(page)); \ ((struct buffer_head *)page_private(page)); \ })
So we get a page without page_private set.
Now XFS always creates buffers in writepage when it doesn't have those yet using the VFS helper create_empty_buffers which calls attach_page_buffers, which sets the page private flag.
Given that the binary 3d driver always caused random VM problems can you try to reproduce it with one loaded?
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