OK, Thank you!
2016-02-12 19:00 GMT+09:00 <sf...@users.sourceforge.net>: > > Hi, > > Akihiro Suda: >> A recent Docker issue reports that AUFS does not work with `fcntl(fd, >> F_SETFL, O_APPEND)`. >> How to reproduce the situation is also attached in the issue ticket. >> https://github.com/docker/docker/issues/20199 > > Thanx for reporting. > > >> I found a workaround which disables `aufs_write()` and uses >> `aufs_write_iter()` instead, even for non-vectorized `write()` calls. > > I'd rather try implementing filp->check_flags() instead of removing > ->write(). > > Generaly the behaviour of aufs fcntl() (and also ioctl()) may not be > good. Because the "file" or "filp" object in aufs, which is refered to > by "file descriptor", differs from the one on the branch filesystem. The > branch fs's filp is a real one, but aufs's is virtual. User handles a > virtual filp. If VFS prepared a method (operation) to support fs > specific fcntl(), aufs implemented it and fcntl() would be fully > supported. Currently there seems not to exist such method. > I will dive more when I have time. > > > J. R. Okajima ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
