> -----Original Message----- > From: David Sterba <[email protected]> > Sent: Thursday, September 3, 2020 5:11 PM > To: Sang, Oliver <[email protected]> > Cc: Goldwyn Rodrigues <[email protected]>; David Sterba > <[email protected]>; LKML <[email protected]>; [email protected]; > lkp <[email protected]>; [email protected]; [email protected] > Subject: Re: [btrfs] c0aaf9b7a1: ltp: stuck at diotest4 > > On Thu, Sep 03, 2020 at 02:28:37PM +0800, kernel test robot wrote: > > Greeting, > > > > FYI, we noticed the following commit (built with gcc-9): > > > > commit: c0aaf9b7a114f6b75e0da97be7d99c102347a751 ("btrfs: switch to > > iomap_dio_rw() for dio") > > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git > > master > > That's probably the O_DIRECT + O_(D)SYNC deadlock that was found recently. > One of the cases in diotest4 does > > open(filename, O_DIRECT | O_RDWR | O_SYNC) > > Fix is work in progress, thanks for the report.
Thanks a lot for information!
