Hi Ilya! On Fri, Dec 20, 2013 at 12:25:13AM +0400, Matvejchikov Ilya wrote: > I'm using VMAP function to create memory writable mapping as it suggested > in ksplice project. Here is the implementation of map_writable function: > ... > > This function works well when I used it to map kernel's text addresses. All > fine and I can rewrite read-only data well via the mapping. > > Now, I need to modify kernel module's text. Given the symbol address inside > the module, I use the same method. The mapping I've got seems to be valid. > But all my changes visible only in that mapping and not in the module! > > I suppose that in case of module mapping I get something like copy-on-write > but I can't prove it. > Looks like I-D cache aliasing... Have you flushed cashes after your modifications were done? Vladimir > Can anyone explain me what's happend and why I can use it for mapping > kernel and can't for modules? > > http://stackoverflow.com/questions/20658357/virtual-mapping-of-kernel-and-module-pages -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>