Messages in this thread | | | Date | Mon, 24 Nov 2003 16:00:02 -0800 | From | Mike Fedyk <> | Subject | Re: What exactly are the issues with 2.6.0-test10 preempt? |
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On Tue, Nov 25, 2003 at 12:50:17AM +0100, Andi Kleen wrote: > Linus Torvalds <torvalds@osdl.org> writes: > > > > The PAGEFREE debug option works well for page allocations, but the slab > > cache is not very amenable to it. For slab debugging, it would be > > wonderful if somebody made a _truly_ debugging slab allocator that didn't > > use the slab cache at all, but used the page allocator (and screw the fact > > that you use too much memory ;) instead. > > One way to find slab corruptions qickly is to write a thrasher: > identify for which slab size the corruptions happens and then write a > small module that runs a thread that just allocates from that slab, > writes a pattern to it, sleeps a bit, and checks the pattern (allocate > multiple slabs to make it more effective). Repeat. > > If you don't know the size cycle through the different cache sizes. > > Me and Chris used that to track down some nasty corruptions on x86-64, > it is especially useful together with LTP which calls a lot of system > calls that could cause corruption.
Do you have your code posted anywhere, and when are you going to merge it with LTP? ;) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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