Hi Nitin, I gave zram a try on a ppc64 box with a 64kB PAGE_SIZE. It looks like the xvmalloc allocator fails when we add in a large enough block (in this case 65532 bytes). flindex ends up as 127 which is larger than BITS_PER_LONG. We continually call grow_block inside find_block and fail: zram: Error allocating memory for compressed page: 0, size=467 Anton -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>