Re: mapped pages being truncated [was Re: 2.6.5-rc2-aa5]

[Andrew Morton]

Andrea Arcangeli <andrea@xxxxxxx> wrote:
>
> here we go, my new debugging WARN_ON in in __remove_from_page_cache
>  triggered just before the other one in page_remove_rmap, as I expected
>  it was truncate removing pages from pagecache before all mappings were
>  dropped:

XFS is doing peculiar things - xfs_setattr calls truncate_inode_pages()
before running vmtruncate().

	xfs_setattr
	->xfs_itruncate_start
	  ->VOP_TOSS_PAGES
	    ->fs_tosspages
	      ->truncate_inode_pages


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