Aug. 6, 2013
10:50 a.m.
Hi, On Tue, Aug 6, 2013 at 4:14 PM, Rajat Sharma <fs.rajat@gmail.com> wrote:
sync does not purge page-cache. I think you need to place some filesystem hooks to purge-cache and make sure nobody else reads the file while you update the block, because it will again populate filesystem page-cache. Purging cache might be tricky.
This does the trick on the user side but for once only. I want to do something similar just after the bio write within the module itself. echo 1 > /proc/sys/vm/drop_caches