On Tue, Aug 6, 2013 at 1:20 PM, Prashant Shah <pshah.mumbai@xxxxxxxxx> wrote: > Hi, > > On Tue, Aug 6, 2013 at 1:15 PM, Rajat Sharma <fs.rajat@xxxxxxxxx> wrote: >> How are you reading and writing? What is your test utility? 'dd' has >> an option to specify iflag/oflag=direct, which would bypass buffer >> cache. But anyways this problem should not happen even if data is >> written to cache, you should read it back from cache. > > I am using cat command. Its a block that belongs to a file and I am > directly writing to the block. On reading the file I am getting stale > data. > Most likely you are getting stale data from filesystem page-cache. Please don't use cat, use dd with iflag/oflag=direct. > Regards. -Rajat _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
