On Wed, Sep 11, 2013 at 06:08:08PM -0500, Mitch Harder wrote: > On Tue, Aug 20, 2013 at 9:51 AM, Mitch Harder > <mitch.harder@xxxxxxxxxxxxxxxx> wrote: > > On Sun, Aug 18, 2013 at 11:44 PM, Minchan Kim <minchan@xxxxxxxxxx> wrote: > >> Hello, > >> > >> On Mon, Aug 19, 2013 at 12:13:02PM +0800, Michael wang wrote: > >>> Hi, Mitch > >>> > >>> On 08/17/2013 10:01 PM, Mitch Harder wrote: > >>> > I'm encountering a BUG while using a ZRAM Swap device. > >>> > > >>> > The call trace seems to involve the changes recently added to 3.10.6 > >>> > by the patch: > >>> > zram: use zram->lock to protect zram_free_page() in swap free notify path > >>> > > >>> > The hardware is a x86 single CPU AMD Athlon XP system with 1GB RAM. > >>> > > >>> > I'm implementing a 352MB ZRAM swap device, and also have 1GB swap > >>> > space on the hard disk. > >>> > >>> IMHO, it was caused by that swap_entry_free() was invoked with page > >>> spin-locked, thus zram_slot_free_notify() should not use rw-lock which > >>> may goto sleep. > >>> > >>> CC folks related. > >> > >> Thanks for Ccing me, Michael, > >> > >> Mitch, It's known problem and it should be fixed by [1] in recent linux-next. > >> > >> [1] a0c516cbfc, zram: don't grab mutex in zram_slot_free_noity > >> > >> Thanks for the report! > >> > > > > Thanks. > > > > If I apply the zram patches from linux-next, the problem seems to be resolved. > > Is it planned to send the patch: "zram: don't grab mutex in > zram_slot_free_noity" to stable? > > I noticed that 3.10.11 still doesn't have this patch. That's because it isn't in a released kernel from Linus yet. Wait for 3.12-rc1 to come out, then I will queue it up. thanks, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
