From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Date: Tue, 13 Jun 2006 13:21:20 +0200 Message-Id: <20060613112120.27913.71986.sendpatchset@lappy> Subject: [PATCH 0/6] mm: tracking dirty pages -v8 Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Hugh Dickins , Andrew Morton , David Howells , Peter Zijlstra , Christoph Lameter , Martin Bligh , Nick Piggin , Linus Torvalds List-ID: The latest version of the tracking dirty pages patch-set. This version handles VM_PFNMAP vmas and the COW case of shared RO mappings. follow_page() got a comment for being weird, but in the light of the set_page_dirty() call that can not yet be removed does something sane. copy_one_pte() also does the right thing, although I wonder why it clears the dirty bit for children? f_op->open() - sets a backing_dev_info f_op->mmap() - modifies both vma->vm_flags and vma->vm_page_prot Since our condition depends on both the backing_dev_info and vma->vm_flags it cannot set vma->vm_page_prot before f_op->mmap(). However this means that !VM_PFNMAP vmas that are shared writable but do not provide a f_op->nopage() and whos backing_dev_info does not have BDI_CAP_NO_ACCT_DIRTY, are left writable. Peter -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org