Hello, On Fri, May 22, 2015 at 07:28:31PM -0400, Johannes Weiner wrote: > replace_page_cache() can clear page->mem_cgroup even when the page > still has references, so unfortunately you must hold the page lock > when calling this function. > > I haven't checked how you use this - chances are you always have the > page locked anyways - but it probably needs a comment.
Hmmm... as replace_page_cache_page() is used only by fuse and fuse's bdi doesn't go through the usual writeback accounting which is necessary for cgroup writeback support anyway, so I don't think this presents an actual problem. I'll add a warning in replace_page_cache_page() which triggers when it's used on a bdi which has cgroup writeback enabled and add comments explaining what's going on. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
