Messages in this thread | | | Subject | Re: [rfc][patch 1/3] fs: new truncate sequence | From | Miklos Szeredi <> | Date | Mon, 06 Jul 2009 20:00:07 +0200 |
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> Index: linux-2.6/mm/truncate.c > =================================================================== > --- linux-2.6.orig/mm/truncate.c > +++ linux-2.6/mm/truncate.c > @@ -465,3 +465,79 @@ int invalidate_inode_pages2(struct addre > return invalidate_inode_pages2_range(mapping, 0, -1); > } > EXPORT_SYMBOL_GPL(invalidate_inode_pages2); > + > +/** > + * truncate_pagecache - unmap mappings "freed" by truncate() syscall > + * @inode: inode > + * @old: old file offset > + * @new: new file offset > + * > + * inode's new i_size must already be written before truncate_pagecache > + * is called. > + */ > +void truncate_pagecache(struct inode * inode, loff_t old, loff_t new) > +{ > + VM_BUG_ON(inode->i_size != new);
This is not true for fuse (and NFS?) as i_size isn't protected by i_mutex during attribute revalidation, and so it can change during the truncate.
Thanks, Miklos
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