Does anyone encounter this problem? and dose anyone have solution to it? Today, I have changed the compress max size from 512KB to 16KB: in cow_file_range_async function, cur_end = min(end, start + 512 * 1024 - 1); --> cur_end = min(end, start + 16 * 1024 - 1); This bug can be reproduced almost every time in my environment. 2014-04-19 20:13 GMT+08:00 ylet ylet <levin.front@gmail.com>:> I tried the latest git pull for linus(2014-04-12). The softlockup bug still > exists. > > I ran IOZONE in performance test with zlib mount option: > mount -t btrfs -o nospace_cache -o compress-force=zlib -o enospc_debug > /dev/sdb /mnt/btrfs > > My PC has i5 4-core CPU, 8GB mem and a 256GB SSD. > > The iozone configuration is as follow: > ./iozone -s 16g -i 0 -i 1 -i 2 -t 4 -r 4k -+w 50 -+y 20 -+C 60 -F > /mnt/btrfs/test1 /mnt/btrfs/test2 /mnt/btrfs/test3 /mnt/btrfs/test >-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html