Re: Stack overrun in 3.5.0-rc7 w/ cfq

2012-07-20 Thread Eric Sandeen
On 7/20/12 9:07 AM, Jeff Moyer wrote: > Eric Sandeen writes: > >> I got this oops & stack overrun warning while running mkfs.ext4 on a sparse >> 4T file hosted on xfs. >> >> Should CFQ be issuing IO here? > > Yes. The on-stack plugging gets flushed when a process is scheduled > out. Seriously

Re: Stack overrun in 3.5.0-rc7 w/ cfq

2012-07-20 Thread Jeff Moyer
Eric Sandeen writes: > I got this oops & stack overrun warning while running mkfs.ext4 on a sparse > 4T file hosted on xfs. > > Should CFQ be issuing IO here? Yes. The on-stack plugging gets flushed when a process is scheduled out. Seriously, Eric, all of that xfs stuff in the stack trace, an

Stack overrun in 3.5.0-rc7 w/ cfq

2012-07-19 Thread Eric Sandeen
I got this oops & stack overrun warning while running mkfs.ext4 on a sparse 4T file hosted on xfs. Should CFQ be issuing IO here? -Eric [10821.639839] BUG: unable to handle kernel paging request at fffb900148a0 [10821.640820] IP: [] cpuacct_charge+0xb4/0x210 [10821.640820] PGD 1c0d067 PUD 0