From: "karam.lee" <[email protected]> Recently rw_page block device operation has been added. This patchset implements rw_page operation for zram block device and does some clean-up .
I implemented the feature in zram and tested it. Test bed was the G2, LG electronic mobile device, whtich has msm8974 processor and 2GB memory. With a memory allocation test program consuming memory, the system generates swap. And operating time of swap_write_page() was measured. -------------------------------------------------- | | operating time | improvement | | | (20 runs average) | | -------------------------------------------------- |with patch | 1087.35 us | | -------------------------------------------------- |without patch| 1061.15 us | +2.4% | -------------------------------------------------- Each test(with paged_io,with BIO) result set shows normal distribution and has equal variance. I mean the two values are valid result to compare. I can say operation with paged I/O(without BIO) is faster 2.4% with confidence level 95%. Patches 1~2 are for clean-up. Patch 3 is for implementation of rw_page operation. With the rw_page operation, zram can do I/O without allocating a BIO. It make zram can save time and memory. karam.lee (3): zram: remove bio parameter from zram_bvec_rw(). zram: change parameter from vaild_io_request() zram: implement rw_page operation of zram drivers/block/zram/zram_drv.c | 69 +++++++++++++++++++++++++++++++---------- 1 file changed, 53 insertions(+), 16 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
