Re: [PATCH] ramfs fixes

From: Juan J. Quintela (
Date: Sat Jun 17 2000 - 09:15:02 EST

>>>>> "al" == Alexander Viro <> writes:


al> * adds a new method to address_space_operations: void detach_page(page).
al> Meaning: do all work necessary to make page droppable. For block-based
al> filesystems it's block_destroy_buffers(). For ramfs - ClearPageDirty().
al> It is used by truncate_complete_page() and truncate_all_inode_pages() -
al> i.e. whenever we are getting rid of a page due to truncate() or final
al> iput() after unlink().

Al, do you see any problem to my previous patch to the list about
including ClearPageDirty(page) in remove_inode_page()???

The reason to put that is that we need to call that function for all
the fs when we are truncating a file, and each time more fs have the
dirty bit set. Actually the Ramfs and the swap, but I have almost
finished a patch for the deferred_file_write of file mmaped patches
from swap_out. I sent a WIP version of this patch also to the list
(the deferred code is not ready for inclusion yet).

Later, Juan.

PD. You can get the patches from:

The one to set the ClearPage Dirty.

The deferred file write one:

This one is a proof of concept only implementation, but I would like
to hear comments.

In theory, practice and theory are the same, but in practice they 
are different -- Larry McVoy

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