Christian Borntraeger 70c88a00fb KVM: s390: do not block CPU on dirty logging ... When doing dirty logging on huge guests (e.g.600GB) we sometimes get rcu stall timeouts with backtraces like [ 2753.194083] ([<0000000000112fb2>] show_trace+0x12a/0x130) [ 2753.194092] [<0000000000113024>] show_stack+0x6c/0xe8 [ 2753.194094] [<00000000001ee6a8>] rcu_pending+0x358/0xa48 [ 2753.194099] [<00000000001f20cc>] rcu_check_callbacks+0x84/0x168 [ 2753.194102] [<0000000000167654>] update_process_times+0x54/0x80 [ 2753.194107] [<00000000001bdb5c>] tick_sched_handle.isra.16+0x4c/0x60 [ 2753.194113] [<00000000001bdbd8>] tick_sched_timer+0x68/0x90 [ 2753.194115] [<0000000000182a88>] __run_hrtimer+0x88/0x1f8 [ 2753.194119] [<00000000001838ba>] hrtimer_interrupt+0x122/0x2b0 [ 2753.194121] [<000000000010d034>] do_extint+0x16c/0x170 [ 2753.194123] [<00000000005e206e>] ext_skip+0x38/0x3e [ 2753.194129] [<000000000012157c>] gmap_test_and_clear_dirty+0xcc/0x118 [ 2753.194134] ([<00000000001214ea>] gmap_test_and_clear_dirty+0x3a/0x118) [ 2753.194137] [<0000000000132da4>] kvm_vm_ioctl_get_dirty_log+0xd4/0x1b0 [ 2753.194143] [<000000000012ac12>] kvm_vm_ioctl+0x21a/0x548 [ 2753.194146] [<00000000002b57f6>] do_vfs_ioctl+0x30e/0x518 [ 2753.194149] [<00000000002b5a9c>] SyS_ioctl+0x9c/0xb0 [ 2753.194151] [<00000000005e1ae6>] sysc_tracego+0x14/0x1a [ 2753.194153] [<000003ffb75f3972>] 0x3ffb75f3972 We should do a cond_resched in here. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>		2016-02-10 13:12:57 +01:00
..
alpha	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
arc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
arm	ARM: multi_v7_defconfig: enable DW_WATCHDOG	2016-02-04 13:25:33 -08:00
arm64	KVM/ARM fixes for v4.5-rc2	2016-02-08 16:20:51 +01:00
avr32	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
blackfin	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
c6x	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
cris	Merge branch 'akpm' (patches from Andrew)	2016-01-21 12:32:08 -08:00
frv	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
h8300	Merge branch 'akpm' (patches from Andrew)	2016-01-21 12:32:08 -08:00
hexagon	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
ia64	[IA64] Enable copy_file_range syscall for ia64	2016-01-22 14:20:01 -08:00
m32r	m32r: fix build failure due to SMP and MMU	2016-02-05 18:10:40 -08:00
m68k	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
metag	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
microblaze	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
mips	regmap: mmio: Revert to v4.4 endianness handling	2016-02-08 10:20:06 -08:00
mn10300	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
nios2	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
openrisc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
parisc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
powerpc	powerpc fixes for 4.5	2016-01-29 16:10:16 -08:00
s390	KVM: s390: do not block CPU on dirty logging	2016-02-10 13:12:57 +01:00
score
sh	sh: fix smp_store_mb for !SMP	2016-01-26 10:18:29 +02:00
sparc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
tile	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
um	um: asm/page.h: remove the pte_high member from struct pte_t	2016-02-05 18:10:40 -08:00
unicore32	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
x86	KVM: x86: consolidate different ways to test for in-kernel LAPIC	2016-02-09 16:57:45 +01:00
xtensa	dma-mapping: remove <asm-generic/dma-coherent.h>	2016-01-20 17:09:18 -08:00
.gitignore
Kconfig	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00