> This patchset is a cleanup for vmap block. And similar/same > patches has been submitted before: > - Johannes Weiner's patch: https://lkml.org/lkml/2011/4/14/619 > - Chanho Min's patch: https://lkml.org/lkml/2013/2/6/810 This is exactly the same patch as mine. The previous two patches are should be concluded. > In Johannes's thread, Mel suggested to figure out if this > bitmap was not supposed to be doing something useful and depending > on that implement recycling of partially used vmap blocks. > > Anyway, just as Johannes said, we shouldn't leave these dead/unused > code as is, because it really is a waste of time for cpus and readers > of the code. And this cleanup doesn't prevent anyone from improving > the algorithm later on. I agree. This unnecessarily bitmap operation can cause significant overhead as https://lkml.org/lkml/2013/2/7/705. Thanks Chanho Min -- 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>