On Wed, Dec 03, 2003 at 05:23:02PM -0800, Linus Torvalds wrote: > On Wed, 3 Dec 2003, Simon Kirby wrote: > > > > In any event, this patch against 2.6.0-test11 compiles without warnings, > > boots, and (bonus) actually works: > > Really? This actually makes a difference for you? I don't see why it > should matter: even if the sector offsets would overflow, why would that > cause _oopses_? > > [ Insert theme to "The Twilight Zone" ] Without the patches, the box gets as far as assembling the array and activating it, but dies on "mke2fs". Running mke2fs through strace shows that it stops during the early stages, before it even tries to write anything. mke2fs appears to seek through the whole device and do a bunch of small reads at various points, and as soon as it tries to read from an offset > 2 TB, it hangs. When I first tried this, something with the configuration caused it to hang so that even nmi_watchdog didn't work. I first assumed it was the result of some sort of current spike from all of the drives working at once, but after gettng it to work with an array size < 2 TB and after seeing different strange Oopses with different total sizes (by removing some drives), the problem appeared to be software-related. I added some printk()s and found the problem occurred shortly after an overflow in linear.c:which_dev(). As soon as I saw the overflow I made the connection and corrected the variable types, but I didn't bother to figure out why it decided to blow up before. I can put an unpatched kernel back on the box and do some more testing if it would be helpful. Simon- - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
