From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 10 Oct 2006 14:13:27 +0200 From: Nick Piggin Subject: Re: [patch 3/3] mm: fault handler to replace nopage and populate Message-ID: <20061010121327.GA2431@wotan.suse.de> References: <20061007105758.14024.70048.sendpatchset@linux.site> <20061007105853.14024.95383.sendpatchset@linux.site> <20061010121003.GA19322@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061010121003.GA19322@infradead.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Hellwig , Linux Memory Management , Andrew Morton , Linux Kernel List-ID: On Tue, Oct 10, 2006 at 01:10:03PM +0100, Christoph Hellwig wrote: > On Sat, Oct 07, 2006 at 03:06:32PM +0200, Nick Piggin wrote: > > +/* > > + * fault_data is filled in the the pagefault handler and passed to the > > + * vma's ->fault function. That function is responsible for filling in > > + * 'type', which is the type of fault if a page is returned, or the type > > + * of error if NULL is returned. > > + */ > > +struct fault_data { > > + struct vm_area_struct *vma; > > + unsigned long address; > > + pgoff_t pgoff; > > + unsigned int flags; > > + > > + int type; > > +}; > > > > /* > > * These are the virtual MM functions - opening of an area, closing and > > @@ -203,6 +221,7 @@ extern pgprot_t protection_map[16]; > > struct vm_operations_struct { > > void (*open)(struct vm_area_struct * area); > > void (*close)(struct vm_area_struct * area); > > + struct page * (*fault)(struct fault_data * data); > > Please pass the vma as an explicit first argument so that all vm_operations > operate on a vma. It's also much cleaner to have the separate between the > the object operated on (the vma) and all the fault details (struct fault_data). Hmm... I agree it is more consistent, but OTOH if we're passing a structure I thought it may as well just go in there. But I will change unless anyone comes up with an objection. -- 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