Messages in this thread | | | Date | Tue, 19 Feb 2013 13:32:56 -0500 | From | Sasha Levin <> | Subject | Re: slab: odd BUG on kzalloc |
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On 02/19/2013 01:29 PM, Dave Jones wrote: > On Tue, Feb 19, 2013 at 01:18:25PM -0500, Sasha Levin wrote: > > > >> [ 169.930103] ---[ end trace 4d135f3def21b4bd ]--- > > >> > > >> The code translates to the following in fs/pipe.c:alloc_pipe_info : > > >> > > >> pipe = kzalloc(sizeof(struct pipe_inode_info), GFP_KERNEL); > > >> if (pipe) { > > >> pipe->bufs = kzalloc(sizeof(struct pipe_buffer) * PIPE_DEF_BUFFERS, GFP_KERNEL); <=== this > > >> if (pipe->bufs) { > > >> init_waitqueue_head(&pipe->wait); > > > > Looks like it's not specific to pipe(). I've also got this one now: > > > > Since I've managed to reproduce it, I'll go ahead and add slub_debug and see what it tells us. > > I'm curious, did you recently upgrade gcc, or other parts of the toolchain ? > This, and one of the other 'weird' bugs you reported recently have me wondering > if perhaps you're seeing a compiler bug.
It happened once on a kernel built on my gentoo box with is generally up to date, but the other time the kernel was built on my mini-server running ubuntu, which isn't updated that often.
So I don't think compiler trickery is involved.
Thanks, Sasha
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