* Bharata B Rao (bharata@xxxxxxxxxxxxxxxxxx) wrote: > On Tue, Sep 08, 2015 at 04:08:06PM +1000, Michael Ellerman wrote: > > On Wed, 2015-08-12 at 10:53 +0530, Bharata B Rao wrote: > > > On Tue, Aug 11, 2015 at 03:48:26PM +0200, Andrea Arcangeli wrote: > > > > Hello Bharata, > > > > > > > > On Tue, Aug 11, 2015 at 03:37:29PM +0530, Bharata B Rao wrote: > > > > > May be it is a bit late to bring this up, but I needed the following fix > > > > > to userfault21 branch of your git tree to compile on powerpc. > > > > > > > > Not late, just in time. I increased the number of syscalls in earlier > > > > versions, it must have gotten lost during a rejecting rebase, sorry. > > > > > > > > I applied it to my tree and it can be applied to -mm and linux-next, > > > > thanks! > > > > > > > > The syscall for arm32 are also ready and on their way to the arm tree, > > > > the testsuite worked fine there. ppc also should work fine if you > > > > could confirm it'd be interesting, just beware that I got a typo in > > > > the testcase: > > > > > > The testsuite passes on powerpc. > > > > > > -------------------- > > > running userfaultfd > > > -------------------- > > > nr_pages: 2040, nr_pages_per_cpu: 170 > > > bounces: 31, mode: rnd racing ver poll, userfaults: 80 43 23 23 15 16 12 1 2 96 13 128 > > > bounces: 30, mode: racing ver poll, userfaults: 35 54 62 49 47 48 2 8 0 78 1 0 > > > bounces: 29, mode: rnd ver poll, userfaults: 114 153 70 106 78 57 143 92 114 96 1 0 > > > bounces: 28, mode: ver poll, userfaults: 96 81 5 45 83 19 98 28 1 145 23 2 > > > bounces: 27, mode: rnd racing poll, userfaults: 54 65 60 54 45 49 1 2 1 2 71 20 > > > bounces: 26, mode: racing poll, userfaults: 90 83 35 29 37 35 30 42 3 4 49 6 > > > bounces: 25, mode: rnd poll, userfaults: 52 50 178 112 51 41 23 42 18 99 59 0 > > > bounces: 24, mode: poll, userfaults: 136 101 83 260 84 29 16 88 1 6 160 57 > > > bounces: 23, mode: rnd racing ver, userfaults: 141 197 158 183 39 49 3 52 8 3 6 0 > > > bounces: 22, mode: racing ver, userfaults: 242 266 244 180 162 32 87 43 31 40 34 0 > > > bounces: 21, mode: rnd ver, userfaults: 636 158 175 24 253 104 48 8 0 0 0 0 > > > bounces: 20, mode: ver, userfaults: 531 204 225 117 129 107 11 143 76 31 1 0 > > > bounces: 19, mode: rnd racing, userfaults: 303 169 225 145 59 219 37 0 0 0 0 0 > > > bounces: 18, mode: racing, userfaults: 374 372 37 144 126 90 25 12 15 17 0 0 > > > bounces: 17, mode: rnd, userfaults: 313 412 134 108 80 99 7 56 85 0 0 0 > > > bounces: 16, mode:, userfaults: 431 58 87 167 120 113 98 60 14 8 48 0 > > > bounces: 15, mode: rnd racing ver poll, userfaults: 41 40 25 28 37 24 0 0 0 0 180 75 > > > bounces: 14, mode: racing ver poll, userfaults: 43 53 30 28 25 15 19 0 0 0 0 30 > > > bounces: 13, mode: rnd ver poll, userfaults: 136 91 114 91 92 79 114 77 75 68 1 2 > > > bounces: 12, mode: ver poll, userfaults: 92 120 114 76 153 75 132 157 83 81 10 1 > > > bounces: 11, mode: rnd racing poll, userfaults: 50 72 69 52 53 48 46 59 57 51 37 1 > > > bounces: 10, mode: racing poll, userfaults: 33 49 38 68 35 63 57 49 49 47 25 10 > > > bounces: 9, mode: rnd poll, userfaults: 167 150 67 123 39 75 1 2 9 125 1 1 > > > bounces: 8, mode: poll, userfaults: 147 102 20 87 5 27 118 14 104 40 21 28 > > > bounces: 7, mode: rnd racing ver, userfaults: 305 254 208 74 59 96 36 14 11 7 4 5 > > > bounces: 6, mode: racing ver, userfaults: 290 114 191 94 162 114 34 6 6 32 23 2 > > > bounces: 5, mode: rnd ver, userfaults: 370 381 22 273 21 106 17 55 0 0 0 0 > > > bounces: 4, mode: ver, userfaults: 328 279 179 191 74 86 95 15 13 10 0 0 > > > bounces: 3, mode: rnd racing, userfaults: 222 215 164 70 5 20 179 0 34 3 0 0 > > > bounces: 2, mode: racing, userfaults: 316 385 112 160 225 5 30 49 42 2 4 0 > > > bounces: 1, mode: rnd, userfaults: 273 139 253 176 163 71 85 2 0 0 0 0 > > > bounces: 0, mode:, userfaults: 165 212 633 13 24 66 24 27 15 0 10 1 > > > [PASS] > > > > Hmm, not for me. See below. > > > > What setup were you testing on Bharata? > > I was on commit a94572f5799dd of userfault21 branch in Andrea's tree > git://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git > > #uname -a > Linux 4.1.0-rc8+ #1 SMP Tue Aug 11 11:33:50 IST 2015 ppc64le ppc64le ppc64le GNU/Linux > > In fact I had successfully done postcopy migration of sPAPR guest with > this setup. Interesting - I'd not got that far myself on power; I was hitting a problem loading htab ( htab_load() bad index 2113929216 (14848+0 entries) in htab stream (htab_shift=25) ) Did you have to make any changes to the qemu code to get that happy? Dave > > > > Mine is: > > > > $ uname -a > > Linux lebuntu 4.2.0-09705-g3a166acc1432 #2 SMP Tue Sep 8 15:18:00 AEST 2015 ppc64le ppc64le ppc64le GNU/Linux > > > > Which is 7d9071a09502 plus a couple of powerpc patches. > > > > $ zgrep USERFAULTFD /proc/config.gz > > CONFIG_USERFAULTFD=y > > > > $ sudo ./userfaultfd 128 32 > > nr_pages: 2048, nr_pages_per_cpu: 128 > > bounces: 31, mode: rnd racing ver poll, error mutex 2 2 > > error mutex 2 10 > -- Dr. David Alan Gilbert / dgilbert@xxxxxxxxxx / Manchester, UK -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
