On Thu, Dec 10, 2015 at 9:35 PM, Liu Bo <bo.li....@oracle.com> wrote: > On Thu, Dec 10, 2015 at 04:30:24PM -0500, Chris Mason wrote: >> On Thu, Dec 10, 2015 at 02:35:55PM -0500, Dave Jones wrote: >> > On Thu, Dec 10, 2015 at 02:02:20PM -0500, Chris Mason wrote: >> > > On Tue, Dec 08, 2015 at 11:25:28PM -0500, Dave Jones wrote: >> > > > Not sure if I've already reported this one, but I've been seeing this >> > > > a lot this last couple days. >> > > > >> > > > kernel BUG at mm/page-writeback.c:2654! >> > > > invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN >> > > > CPU: 1 PID: 2566 Comm: trinity-c1 Tainted: G W >> > 4.4.0-rc4-think+ #14 >> > > > task: ffff880462811b80 ti: ffff8800cd808000 task.ti: ffff8800cd808000 >> > > > RIP: 0010:[<ffffffff8826ff40>] [<ffffffff8826ff40>] >> > clear_page_dirty_for_io+0x180/0x1d0 >> > > >> > > Huh, are you able to reproduce at will? From this code path it should >> > > mean somebody else is unlocking a page they don't own. >> > >> > pretty easily yeah. I hit it maybe a couple dozen times yesterday. >> > So if you've got some idea of printk's to spray anywhere I can give >> > that a shot. >> >> I'd rather try to trigger it here. Going to have to add some way to >> record which stack trace last unlocked and/or freed the page. > > Looks like a bisect with 4.3 might target the commit.
Not necessarily a regression added in 4.3. We've had this issue reported before on older releases, like 4.1 for example: https://lkml.org/lkml/2015/5/19/190 > > Thanks, > > -liubo >> >> -chris >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Filipe David Manana, "Reasonable men adapt themselves to the world. Unreasonable men adapt the world to themselves. That's why all progress depends on unreasonable men." -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
