Messages in this thread | | | Date | Tue, 18 Apr 2006 17:05:17 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH 5/5] Swapless V2: Revise main migration logic |
| |
On Mon, 17 Apr 2006 23:58:41 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
> Hmmm... Good ideas. I think it could be much simpler like the following > patch. > > However, the problem here is how to know that we really took the anon_vma > lock and what to do about a page being unmmapped while migrating. This > could cause the anon_vma not to be unlocked. > lock dependency here is page_lock(page) -> page's anon_vma->lock. So, I guess anon_vma->lock cannot be unlocked by other threads if we have page_lock(page).
> I guess we would need to have try_to_unmap return some state information. What kind of information ?
> I also toyed around with writing an "install_migration_ptes" function > which would be called only for anonymous pages and would reduce the > changes to try_to_unmap(). However, that also got too complicated. >
-Kame
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |