Re: 2.4.0-test10-pre3:Oops in mm/filemap.c:filemap_write_pa

[Russell King]

Linus Torvalds writes:
> Can you get a full stack trace?

filemap_write_page
filemap_sync
filemap_unmap
do_munmap
sys_munmap

> How about adding a test in invalidate_inode_pages() like

(Added, along with a call to drop a stack trace out).

Yes, this does stop the problem in filemap_write_page.  The stack trace
here shows:

invalidate_inode_pages
nfs_zap_caches
nfs_lock
fcntl_setlk
do_fcntl
sys_fcntl

So I guess that NFS locking is really bad if the region is mmapped!
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