On Thu, Jul 27, 2017 at 04:12:18PM +0000, Kani, Toshimitsu wrote: > On Wed, 2017-07-26 at 10:11 -0700, Matthew Wilcox wrote: > > On Wed, Jul 26, 2017 at 06:23:08PM +0900, OGAWA Hirofumi wrote: > > > The locking of this path seems to be broken. The guy familiar to > > > bdev_write_page() path will made real fix though, The following > > > patch should be explaining enough what is wrong. > > > > > > In short, clean_buffers() must be called before unlocking > > > lock_page(). > > > > Thanks for that. This should fix the problem while not leaking the > > unlock_page call outside bdev_write_page. > > > > --- 8< --- > > > > Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> > > Thanks Willy and Hirofumi for the quick fix! I've tested the change, > and it works fine. > > Tested-by: Toshi Kani <toshi.kani@xxxxxxx> > > Out of curiosity, I am still wondering about the following: > - Why is this issue exposed with FAT FS, but not with other FSs? > - Why did I not see this issue with BTT? I also didn't see it with FAT + BRD, so I think the answer to both of the above is just that the timings were different.
