search for: stub_clone

...[<ffffffff810b25c7>] ? lock_release+0x117/0x250 [ 3009.962283] [<ffffffff817d26c0>] ? _raw_spin_unlock+0x30/0x60 [ 3009.971532] [<ffffffff817d3495>] ? sysret_check+0x22/0x5d [ 3009.980820] [<ffffffff81017523>] sys_clone+0x23/0x30 [ 3009.990046] [<ffffffff817d37f3>] stub_clone+0x13/0x20 [ 3009.999335] [<ffffffff817d3469>] ? system_call_fastpath+0x16/0x1b [ 3010.008667] ---[ end trace 2d9694c2c0a24da8 ]--- It seems to be due to the "mcelog" userspace tool provided with Debian Squeeze (mcelog 1.0~pre3-3 x86-64 Machine Check Exceptions collector and deco...

...004] [<ffffffff81083012>] ? dup_mm+0x362/0x680 [ 32.305004] [<ffffffff810847ae>] ? copy_process+0x144e/0x1960 [ 32.305004] [<ffffffff81084e71>] ? do_fork+0x91/0x2c0 [ 32.305004] [<ffffffff81085126>] ? SyS_clone+0x16/0x20 [ 32.305004] [<ffffffff816974d9>] ? stub_clone+0x69/0x90 [ 32.305004] [<ffffffff81697189>] ? system_call_fastpath+0x16/0x1b [ 32.305004] Code: 20 e9 2f ff ff ff 44 89 fa 44 89 ee 48 c7 c7 10 45 8c 81 31 c0 e8 9d 14 00 00 58 5a 5b 41 5c 41 5d 41 5e 41 5f 5d c3 55 48 89 e5 <0f> 0b 66 66 66 66 90 55 48 89 e5 0f 0b 55 48 89 e5 0f 0...

...1083012>] ? dup_mm+0x362/0x680 > [ 32.305004] [<ffffffff810847ae>] ? copy_process+0x144e/0x1960 > [ 32.305004] [<ffffffff81084e71>] ? do_fork+0x91/0x2c0 > [ 32.305004] [<ffffffff81085126>] ? SyS_clone+0x16/0x20 > [ 32.305004] [<ffffffff816974d9>] ? stub_clone+0x69/0x90 > [ 32.305004] [<ffffffff81697189>] ? system_call_fastpath+0x16/0x1b > [ 32.305004] Code: 20 e9 2f ff ff ff 44 89 fa 44 89 ee 48 c7 c7 10 45 8c > 81 31 c0 e8 9d 14 00 00 58 5a 5b 41 5c 41 5d 41 5e 41 5f 5d c3 55 48 89 e5 > <0f> 0b 66 66 66 66 90 55 48 89 e5 0f...

...;ffffffffa034b132>] ttm_bo_vm_open+0x52/0x80 [ttm] [ 25.163214] [<ffffffff81088f17>] copy_process.part.26+0x18f7/0x1b90 [ 25.163219] [<ffffffff81089373>] do_fork+0xc3/0x370 [ 25.163225] [<ffffffff810896a6>] SyS_clone+0x16/0x20 [ 25.163229] [<ffffffff81700189>] stub_clone+0x69/0x90 [ 25.163234] [<ffffffff816ffe29>] ? system_call_fastpath+0x16/0x1b [ 25.163237] ---[ end trace da86bd3f343ad454 ]--- [ 25.163241] ------------[ cut here ]------------ and when using it thousands of lines with [ 342.347721] nouveau E[ PDISP][0000:01:00.0] chid 0 mthd 0x00...

This patch is a significant performance improvement for the m2p_override: about 6% using the gntdev device. Each m2p_add/remove_override call issues a MULTI_grant_table_op and a __flush_tlb_single if kmap_op != NULL. Batching all the calls together is a great performance benefit because it means issuing one hypercall total rather than two hypercall per page. If paravirt_lazy_mode is set

...b>] ? copy_process+0x109/0x1071 Sep 5 18:03:14 pcale kernel: [ 985.446956] [<ffffffff8104621d>] ? do_fork+0xe1/0x21c Sep 5 18:03:14 pcale kernel: [ 985.446959] [<ffffffff810f8f64>] ? fd_install+0x25/0x4a Sep 5 18:03:14 pcale kernel: [ 985.446961] [<ffffffff81353e73>] ? stub_clone+0x13/0x20 Sep 5 18:03:14 pcale kernel: [ 985.446963] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Sep 5 18:03:14 pcale kernel: [ 985.446965] Mem-Info: Sep 5 18:03:14 pcale kernel: [ 985.446966] Node 0 DMA per-cpu: Sep 5 18:03:14 pcale kernel: [ 985.446968] CPU 0: hi: 0...

Greetings, I got the below dmesg and the first bad commit is commit cf39c8e5352b4fb9efedfe7e9acb566a85ed847c Merge: 3398d25 23b7eaf Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Wed Sep 4 17:45:39 2013 -0700 Merge tag ''stable/for-linus-3.12-rc0-tag'' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull Xen updates from Konrad