Hi Joe, Sorry for the late reply. We have been fixing bugs and conducting many experiments with heavy I/O to verify the correctness and stability of our storage. This problem I mentioned in this thread cannot be reproduced anymore with these two patches (I applied them back to 3.19.8 and 4.2.8 and both work fine). Thanks for your help. Dennis 2016-07-01 21:18 GMT+08:00 Edward Thornber : > Hi Dennis, > > Sorry to take so long about getting back to you. There was a bug in > the btree library that I mistakenly thought was caused by my fix for > your problem. Anyway, could you try and recreate your problem with > these two patches applied please (patches are against v4.7-rc5 + my > usual thin-dev extras): > > https://github.com/jthornber/linux-2.6/commit/ > ebdd99fc12acd0e9178831549896633171d5af1d > https://github.com/jthornber/linux-2.6/commit/ > c05989b59d091270c2bf7dd05bdb7a3575223529 > > Thanks, > > - Joe > -- Dennis Yang QNAP Systems, Inc. Skype: qnap.dennis.yang Email: dennisyang@qnap.com Tel: (+886)-2-2393-5152 ext. 15018 Address: 13F., No.56, Sec. 1, Xinsheng S. Rd., Zhongzheng Dist., Taipei City, Taiwan