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Message-ID: <20141218213758.GA25918@redhat.com> Date: Thu, 18 Dec 2014 16:37:58 -0500 From: Dave Jones <davej@...hat.com> To: Andy Lutomirski <luto@...capital.net> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Chris Mason <clm@...com>, Mike Galbraith <umgwanakikbuti@...il.com>, Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Dâniel Fraga <fragabr@...il.com>, Sasha Levin <sasha.levin@...cle.com>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Suresh Siddha <sbsiddha@...il.com>, Oleg Nesterov <oleg@...hat.com>, Peter Anvin <hpa@...ux.intel.com> Subject: Re: save_xstate_sig (Re: frequent lockups in 3.18rc4) On Thu, Dec 18, 2014 at 01:17:59PM -0800, Andy Lutomirski wrote: > FWIW, if xsave traps with cr2 value, then there would indeed be an > infinite loop in here. It seems to work right on my machine. Dave, > want to run the attached little test? XSAVE to offset 0 [OK] xsave offset = 0, cr2 offset = 831 XSAVE to offset 64 [OK] xsave offset = 64, cr2 offset = 895 XSAVE to offset 128 [OK] xsave offset = 128, cr2 offset = 959 XSAVE to offset 192 [OK] xsave offset = 192, cr2 offset = 1023 XSAVE to offset 256 [OK] xsave offset = 256, cr2 offset = 1087 XSAVE to offset 320 [OK] xsave offset = 320, cr2 offset = 1151 XSAVE to offset 384 [OK] xsave offset = 384, cr2 offset = 1215 XSAVE to offset 448 [OK] xsave offset = 448, cr2 offset = 1279 XSAVE to offset 512 [OK] xsave offset = 512, cr2 offset = 1343 XSAVE to offset 576 [OK] xsave offset = 576, cr2 offset = 1407 XSAVE to offset 640 [OK] xsave offset = 640, cr2 offset = 1471 XSAVE to offset 704 [OK] xsave offset = 704, cr2 offset = 1535 XSAVE to offset 768 [OK] xsave offset = 768, cr2 offset = 1599 XSAVE to offset 832 [OK] xsave offset = 832, cr2 offset = 1663 XSAVE to offset 896 [OK] xsave offset = 896, cr2 offset = 1727 XSAVE to offset 960 [OK] xsave offset = 960, cr2 offset = 1791 XSAVE to offset 1024 [OK] xsave offset = 1024, cr2 offset = 1855 XSAVE to offset 1088 [OK] xsave offset = 1088, cr2 offset = 1919 XSAVE to offset 1152 [OK] xsave offset = 1152, cr2 offset = 1983 XSAVE to offset 1216 [OK] xsave offset = 1216, cr2 offset = 2047 XSAVE to offset 1280 [OK] xsave offset = 1280, cr2 offset = 2111 XSAVE to offset 1344 [OK] xsave offset = 1344, cr2 offset = 2175 XSAVE to offset 1408 [OK] xsave offset = 1408, cr2 offset = 2239 XSAVE to offset 1472 [OK] xsave offset = 1472, cr2 offset = 2303 XSAVE to offset 1536 [OK] xsave offset = 1536, cr2 offset = 2367 XSAVE to offset 1600 [OK] xsave offset = 1600, cr2 offset = 2431 XSAVE to offset 1664 [OK] xsave offset = 1664, cr2 offset = 2495 XSAVE to offset 1728 [OK] xsave offset = 1728, cr2 offset = 2559 XSAVE to offset 1792 [OK] xsave offset = 1792, cr2 offset = 2623 XSAVE to offset 1856 [OK] xsave offset = 1856, cr2 offset = 2687 XSAVE to offset 1920 [OK] xsave offset = 1920, cr2 offset = 2751 XSAVE to offset 1984 [OK] xsave offset = 1984, cr2 offset = 2815 XSAVE to offset 2048 [OK] xsave offset = 2048, cr2 offset = 2879 XSAVE to offset 2112 [OK] xsave offset = 2112, cr2 offset = 2943 XSAVE to offset 2176 [OK] xsave offset = 2176, cr2 offset = 3007 XSAVE to offset 2240 [OK] xsave offset = 2240, cr2 offset = 3071 XSAVE to offset 2304 [OK] xsave offset = 2304, cr2 offset = 3135 XSAVE to offset 2368 [OK] xsave offset = 2368, cr2 offset = 3199 XSAVE to offset 2432 [OK] xsave offset = 2432, cr2 offset = 3263 XSAVE to offset 2496 [OK] xsave offset = 2496, cr2 offset = 3327 XSAVE to offset 2560 [OK] xsave offset = 2560, cr2 offset = 3391 XSAVE to offset 2624 [OK] xsave offset = 2624, cr2 offset = 3455 XSAVE to offset 2688 [OK] xsave offset = 2688, cr2 offset = 3519 XSAVE to offset 2752 [OK] xsave offset = 2752, cr2 offset = 3583 XSAVE to offset 2816 [OK] xsave offset = 2816, cr2 offset = 3647 XSAVE to offset 2880 [OK] xsave offset = 2880, cr2 offset = 3711 XSAVE to offset 2944 [OK] xsave offset = 2944, cr2 offset = 3775 XSAVE to offset 3008 [OK] xsave offset = 3008, cr2 offset = 3839 XSAVE to offset 3072 [OK] xsave offset = 3072, cr2 offset = 3903 XSAVE to offset 3136 [OK] xsave offset = 3136, cr2 offset = 3967 XSAVE to offset 3200 [OK] xsave offset = 3200, cr2 offset = 4031 XSAVE to offset 3264 [OK] xsave offset = 3264, cr2 offset = 4095 XSAVE to offset 3328 [OK] xsave offset = 3328, cr2 offset = 3328 XSAVE to offset 3392 [OK] xsave offset = 3392, cr2 offset = 3392 XSAVE to offset 3456 [OK] xsave offset = 3456, cr2 offset = 3456 XSAVE to offset 3520 [OK] xsave offset = 3520, cr2 offset = 3520 XSAVE to offset 3584 [OK] xsave offset = 3584, cr2 offset = 3584 XSAVE to offset 3648 [OK] xsave offset = 3648, cr2 offset = 3648 XSAVE to offset 3712 [OK] xsave offset = 3712, cr2 offset = 3712 XSAVE to offset 3776 [OK] xsave offset = 3776, cr2 offset = 3776 XSAVE to offset 3840 [OK] xsave offset = 3840, cr2 offset = 3840 XSAVE to offset 3904 [OK] xsave offset = 3904, cr2 offset = 3904 XSAVE to offset 3968 [OK] xsave offset = 3968, cr2 offset = 3968 XSAVE to offset 4032 [OK] xsave offset = 4032, cr2 offset = 4032 XSAVE to offset 4096 XSAVE to offset 4160 XSAVE to offset 4224 XSAVE to offset 4288 XSAVE to offset 4352 XSAVE to offset 4416 XSAVE to offset 4480 XSAVE to offset 4544 XSAVE to offset 4608 XSAVE to offset 4672 XSAVE to offset 4736 XSAVE to offset 4800 XSAVE to offset 4864 XSAVE to offset 4928 XSAVE to offset 4992 XSAVE to offset 5056 XSAVE to offset 5120 XSAVE to offset 5184 XSAVE to offset 5248 XSAVE to offset 5312 XSAVE to offset 5376 XSAVE to offset 5440 XSAVE to offset 5504 XSAVE to offset 5568 XSAVE to offset 5632 XSAVE to offset 5696 XSAVE to offset 5760 XSAVE to offset 5824 XSAVE to offset 5888 XSAVE to offset 5952 XSAVE to offset 6016 XSAVE to offset 6080 XSAVE to offset 6144 XSAVE to offset 6208 XSAVE to offset 6272 XSAVE to offset 6336 XSAVE to offset 6400 XSAVE to offset 6464 XSAVE to offset 6528 XSAVE to offset 6592 XSAVE to offset 6656 XSAVE to offset 6720 XSAVE to offset 6784 XSAVE to offset 6848 XSAVE to offset 6912 XSAVE to offset 6976 XSAVE to offset 7040 XSAVE to offset 7104 XSAVE to offset 7168 XSAVE to offset 7232 XSAVE to offset 7296 XSAVE to offset 7360 XSAVE to offset 7424 [OK] xsave offset = 7424, cr2 offset = 8255 XSAVE to offset 7488 [OK] xsave offset = 7488, cr2 offset = 8319 XSAVE to offset 7552 [OK] xsave offset = 7552, cr2 offset = 8383 XSAVE to offset 7616 [OK] xsave offset = 7616, cr2 offset = 8447 XSAVE to offset 7680 [OK] xsave offset = 7680, cr2 offset = 8511 XSAVE to offset 7744 [OK] xsave offset = 7744, cr2 offset = 8575 XSAVE to offset 7808 [OK] xsave offset = 7808, cr2 offset = 8639 XSAVE to offset 7872 [OK] xsave offset = 7872, cr2 offset = 8703 XSAVE to offset 7936 [OK] xsave offset = 7936, cr2 offset = 8767 XSAVE to offset 8000 [OK] xsave offset = 8000, cr2 offset = 8831 XSAVE to offset 8064 [OK] xsave offset = 8064, cr2 offset = 8895 XSAVE to offset 8128 [OK] xsave offset = 8128, cr2 offset = 8959 XSAVE to offset 8192 [OK] xsave offset = 8192, cr2 offset = 9023 PASS! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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