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Groups > linux.kernel > #1707514
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.12 102/106] sparc64: Measure receiver forward progress to avoid send mondo timeout |
| Date | 2017-08-09 19:00 +0200 |
| Message-ID | <ucCuT-1ua-29@gated-at.bofh.it> (permalink) |
| References | <ucCuR-1ua-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jane Chu <jane.chu@oracle.com>
[ Upstream commit 9d53caec84c7c5700e7c1ed744ea584fff55f9ac ]
A large sun4v SPARC system may have moments of intensive xcall activities,
usually caused by unmapping many pages on many CPUs concurrently. This can
flood receivers with CPU mondo interrupts for an extended period, causing
some unlucky senders to hit send-mondo timeout. This problem gets worse
as cpu count increases because sometimes mappings must be invalidated on
all CPUs, and sometimes all CPUs may gang up on a single CPU.
But a busy system is not a broken system. In the above scenario, as long
as the receiver is making forward progress processing mondo interrupts,
the sender should continue to retry.
This patch implements the receiver's forward progress meter by introducing
a per cpu counter 'cpu_mondo_counter[cpu]' where 'cpu' is in the range
of 0..NR_CPUS. The receiver increments its counter as soon as it receives
a mondo and the sender tracks the receiver's counter. If the receiver has
stopped making forward progress when the retry limit is reached, the sender
declares send-mondo-timeout and panic; otherwise, the receiver is allowed
to keep making forward progress.
In addition, it's been observed that PCIe hotplug events generate Correctable
Errors that are handled by hypervisor and then OS. Hypervisor 'borrows'
a guest cpu strand briefly to provide the service. If the cpu strand is
simultaneously the only cpu targeted by a mondo, it may not be available
for the mondo in 20msec, causing SUN4V mondo timeout. It appears that 1 second
is the agreed wait time between hypervisor and guest OS, this patch makes
the adjustment.
Orabug: 25476541
Orabug: 26417466
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Reviewed-by: Rob Gardner <rob.gardner@oracle.com>
Reviewed-by: Thomas Tai <thomas.tai@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/sparc/include/asm/trap_block.h | 1
arch/sparc/kernel/smp_64.c | 189 ++++++++++++++++++++++--------------
arch/sparc/kernel/sun4v_ivec.S | 15 ++
arch/sparc/kernel/traps_64.c | 1
4 files changed, 134 insertions(+), 72 deletions(-)
--- a/arch/sparc/include/asm/trap_block.h
+++ b/arch/sparc/include/asm/trap_block.h
@@ -54,6 +54,7 @@ extern struct trap_per_cpu trap_block[NR
void init_cur_cpu_trap(struct thread_info *);
void setup_tba(void);
extern int ncpus_probed;
+extern u64 cpu_mondo_counter[NR_CPUS];
unsigned long real_hard_smp_processor_id(void);
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -622,22 +622,48 @@ retry:
}
}
-/* Multi-cpu list version. */
+#define CPU_MONDO_COUNTER(cpuid) (cpu_mondo_counter[cpuid])
+#define MONDO_USEC_WAIT_MIN 2
+#define MONDO_USEC_WAIT_MAX 100
+#define MONDO_RETRY_LIMIT 500000
+
+/* Multi-cpu list version.
+ *
+ * Deliver xcalls to 'cnt' number of cpus in 'cpu_list'.
+ * Sometimes not all cpus receive the mondo, requiring us to re-send
+ * the mondo until all cpus have received, or cpus are truly stuck
+ * unable to receive mondo, and we timeout.
+ * Occasionally a target cpu strand is borrowed briefly by hypervisor to
+ * perform guest service, such as PCIe error handling. Consider the
+ * service time, 1 second overall wait is reasonable for 1 cpu.
+ * Here two in-between mondo check wait time are defined: 2 usec for
+ * single cpu quick turn around and up to 100usec for large cpu count.
+ * Deliver mondo to large number of cpus could take longer, we adjusts
+ * the retry count as long as target cpus are making forward progress.
+ */
static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt)
{
- int retries, this_cpu, prev_sent, i, saw_cpu_error;
+ int this_cpu, tot_cpus, prev_sent, i, rem;
+ int usec_wait, retries, tot_retries;
+ u16 first_cpu = 0xffff;
+ unsigned long xc_rcvd = 0;
unsigned long status;
+ int ecpuerror_id = 0;
+ int enocpu_id = 0;
u16 *cpu_list;
+ u16 cpu;
this_cpu = smp_processor_id();
-
cpu_list = __va(tb->cpu_list_pa);
-
- saw_cpu_error = 0;
- retries = 0;
+ usec_wait = cnt * MONDO_USEC_WAIT_MIN;
+ if (usec_wait > MONDO_USEC_WAIT_MAX)
+ usec_wait = MONDO_USEC_WAIT_MAX;
+ retries = tot_retries = 0;
+ tot_cpus = cnt;
prev_sent = 0;
+
do {
- int forward_progress, n_sent;
+ int n_sent, mondo_delivered, target_cpu_busy;
status = sun4v_cpu_mondo_send(cnt,
tb->cpu_list_pa,
@@ -645,94 +671,113 @@ static void hypervisor_xcall_deliver(str
/* HV_EOK means all cpus received the xcall, we're done. */
if (likely(status == HV_EOK))
- break;
+ goto xcall_done;
+
+ /* If not these non-fatal errors, panic */
+ if (unlikely((status != HV_EWOULDBLOCK) &&
+ (status != HV_ECPUERROR) &&
+ (status != HV_ENOCPU)))
+ goto fatal_errors;
/* First, see if we made any forward progress.
*
+ * Go through the cpu_list, count the target cpus that have
+ * received our mondo (n_sent), and those that did not (rem).
+ * Re-pack cpu_list with the cpus remain to be retried in the
+ * front - this simplifies tracking the truly stalled cpus.
+ *
* The hypervisor indicates successful sends by setting
* cpu list entries to the value 0xffff.
+ *
+ * EWOULDBLOCK means some target cpus did not receive the
+ * mondo and retry usually helps.
+ *
+ * ECPUERROR means at least one target cpu is in error state,
+ * it's usually safe to skip the faulty cpu and retry.
+ *
+ * ENOCPU means one of the target cpu doesn't belong to the
+ * domain, perhaps offlined which is unexpected, but not
+ * fatal and it's okay to skip the offlined cpu.
*/
+ rem = 0;
n_sent = 0;
for (i = 0; i < cnt; i++) {
- if (likely(cpu_list[i] == 0xffff))
+ cpu = cpu_list[i];
+ if (likely(cpu == 0xffff)) {
n_sent++;
+ } else if ((status == HV_ECPUERROR) &&
+ (sun4v_cpu_state(cpu) == HV_CPU_STATE_ERROR)) {
+ ecpuerror_id = cpu + 1;
+ } else if (status == HV_ENOCPU && !cpu_online(cpu)) {
+ enocpu_id = cpu + 1;
+ } else {
+ cpu_list[rem++] = cpu;
+ }
}
- forward_progress = 0;
- if (n_sent > prev_sent)
- forward_progress = 1;
+ /* No cpu remained, we're done. */
+ if (rem == 0)
+ break;
- prev_sent = n_sent;
+ /* Otherwise, update the cpu count for retry. */
+ cnt = rem;
- /* If we get a HV_ECPUERROR, then one or more of the cpus
- * in the list are in error state. Use the cpu_state()
- * hypervisor call to find out which cpus are in error state.
+ /* Record the overall number of mondos received by the
+ * first of the remaining cpus.
*/
- if (unlikely(status == HV_ECPUERROR)) {
- for (i = 0; i < cnt; i++) {
- long err;
- u16 cpu;
-
- cpu = cpu_list[i];
- if (cpu == 0xffff)
- continue;
-
- err = sun4v_cpu_state(cpu);
- if (err == HV_CPU_STATE_ERROR) {
- saw_cpu_error = (cpu + 1);
- cpu_list[i] = 0xffff;
- }
- }
- } else if (unlikely(status != HV_EWOULDBLOCK))
- goto fatal_mondo_error;
+ if (first_cpu != cpu_list[0]) {
+ first_cpu = cpu_list[0];
+ xc_rcvd = CPU_MONDO_COUNTER(first_cpu);
+ }
- /* Don't bother rewriting the CPU list, just leave the
- * 0xffff and non-0xffff entries in there and the
- * hypervisor will do the right thing.
- *
- * Only advance timeout state if we didn't make any
- * forward progress.
+ /* Was any mondo delivered successfully? */
+ mondo_delivered = (n_sent > prev_sent);
+ prev_sent = n_sent;
+
+ /* or, was any target cpu busy processing other mondos? */
+ target_cpu_busy = (xc_rcvd < CPU_MONDO_COUNTER(first_cpu));
+ xc_rcvd = CPU_MONDO_COUNTER(first_cpu);
+
+ /* Retry count is for no progress. If we're making progress,
+ * reset the retry count.
*/
- if (unlikely(!forward_progress)) {
- if (unlikely(++retries > 10000))
- goto fatal_mondo_timeout;
-
- /* Delay a little bit to let other cpus catch up
- * on their cpu mondo queue work.
- */
- udelay(2 * cnt);
+ if (likely(mondo_delivered || target_cpu_busy)) {
+ tot_retries += retries;
+ retries = 0;
+ } else if (unlikely(retries > MONDO_RETRY_LIMIT)) {
+ goto fatal_mondo_timeout;
}
- } while (1);
- if (unlikely(saw_cpu_error))
- goto fatal_mondo_cpu_error;
+ /* Delay a little bit to let other cpus catch up on
+ * their cpu mondo queue work.
+ */
+ if (!mondo_delivered)
+ udelay(usec_wait);
- return;
+ retries++;
+ } while (1);
-fatal_mondo_cpu_error:
- printk(KERN_CRIT "CPU[%d]: SUN4V mondo cpu error, some target cpus "
- "(including %d) were in error state\n",
- this_cpu, saw_cpu_error - 1);
+xcall_done:
+ if (unlikely(ecpuerror_id > 0)) {
+ pr_crit("CPU[%d]: SUN4V mondo cpu error, target cpu(%d) was in error state\n",
+ this_cpu, ecpuerror_id - 1);
+ } else if (unlikely(enocpu_id > 0)) {
+ pr_crit("CPU[%d]: SUN4V mondo cpu error, target cpu(%d) does not belong to the domain\n",
+ this_cpu, enocpu_id - 1);
+ }
return;
+fatal_errors:
+ /* fatal errors include bad alignment, etc */
+ pr_crit("CPU[%d]: Args were cnt(%d) cpulist_pa(%lx) mondo_block_pa(%lx)\n",
+ this_cpu, tot_cpus, tb->cpu_list_pa, tb->cpu_mondo_block_pa);
+ panic("Unexpected SUN4V mondo error %lu\n", status);
+
fatal_mondo_timeout:
- printk(KERN_CRIT "CPU[%d]: SUN4V mondo timeout, no forward "
- " progress after %d retries.\n",
- this_cpu, retries);
- goto dump_cpu_list_and_out;
-
-fatal_mondo_error:
- printk(KERN_CRIT "CPU[%d]: Unexpected SUN4V mondo error %lu\n",
- this_cpu, status);
- printk(KERN_CRIT "CPU[%d]: Args were cnt(%d) cpulist_pa(%lx) "
- "mondo_block_pa(%lx)\n",
- this_cpu, cnt, tb->cpu_list_pa, tb->cpu_mondo_block_pa);
-
-dump_cpu_list_and_out:
- printk(KERN_CRIT "CPU[%d]: CPU list [ ", this_cpu);
- for (i = 0; i < cnt; i++)
- printk("%u ", cpu_list[i]);
- printk("]\n");
+ /* some cpus being non-responsive to the cpu mondo */
+ pr_crit("CPU[%d]: SUN4V mondo timeout, cpu(%d) made no forward progress after %d retries. Total target cpus(%d).\n",
+ this_cpu, first_cpu, (tot_retries + retries), tot_cpus);
+ panic("SUN4V mondo timeout panic\n");
}
static void (*xcall_deliver_impl)(struct trap_per_cpu *, int);
--- a/arch/sparc/kernel/sun4v_ivec.S
+++ b/arch/sparc/kernel/sun4v_ivec.S
@@ -26,6 +26,21 @@ sun4v_cpu_mondo:
ldxa [%g0] ASI_SCRATCHPAD, %g4
sub %g4, TRAP_PER_CPU_FAULT_INFO, %g4
+ /* Get smp_processor_id() into %g3 */
+ sethi %hi(trap_block), %g5
+ or %g5, %lo(trap_block), %g5
+ sub %g4, %g5, %g3
+ srlx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
+
+ /* Increment cpu_mondo_counter[smp_processor_id()] */
+ sethi %hi(cpu_mondo_counter), %g5
+ or %g5, %lo(cpu_mondo_counter), %g5
+ sllx %g3, 3, %g3
+ add %g5, %g3, %g5
+ ldx [%g5], %g3
+ add %g3, 1, %g3
+ stx %g3, [%g5]
+
/* Get CPU mondo queue base phys address into %g7. */
ldx [%g4 + TRAP_PER_CPU_CPU_MONDO_PA], %g7
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -2733,6 +2733,7 @@ void do_getpsr(struct pt_regs *regs)
}
}
+u64 cpu_mondo_counter[NR_CPUS] = {0};
struct trap_per_cpu trap_block[NR_CPUS];
EXPORT_SYMBOL(trap_block);
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[PATCH 4.12 000/106] 4.12.6-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:00 +0200
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[PATCH 4.12 102/106] sparc64: Measure receiver forward progress to avoid send mondo timeout Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:00 +0200
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[PATCH 4.12 085/106] net/mlx5: Fix command bad flow on command entry allocation failure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 071/106] ipv4: initialize fib_trie prior to register_netdev_notifier call. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 063/106] tcp_bbr: init pacing rate on first RTT sample Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 094/106] net/mlx5e: Add missing support for PTP_CLK_REQ_PPS request Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 086/106] sctp: dont dereference ptr before leaving _sctp_walk_{params, errors}() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 066/106] net: Zero terminate ifr_name in dev_ifname(). Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 093/106] net/mlx5e: Change 1PPS out scheme Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:10 +0200
[PATCH 4.12 042/106] ARM: mvebu: use __pa_symbol in the mv98dx3236 platform SMP code Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 022/106] cpuset: fix a deadlock due to incomplete patching of cpusets_enabled() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 019/106] userfaultfd: non-cooperative: notify about unmap of destination during mremap Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 041/106] clk: sunxi-ng: sun5i: Add clk_set_rate_parent to the CPU clock Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 045/106] media: pulse8-cec: persistent_config should be off by default Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 017/106] mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 024/106] ALSA: hda - Fix speaker output from VAIO VPCL14M1R Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 012/106] brcmfmac: fix memleak due to calling brcmf_sdiod_sgtable_alloc() twice Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 038/106] ext4: fix SEEK_HOLE/SEEK_DATA for blocksize < pagesize Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 018/106] mm/hugetlb.c: __get_user_pages ignores certain follow_hugetlb_page errors Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 050/106] tcmu: Fix possbile memory leak / OOPs when recalculating cmd base size Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 013/106] NFSv4: Fix EXCHANGE_ID corrupt verifier issue Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 046/106] media: lirc: LIRC_GET_REC_RESOLUTION should return microseconds Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 023/106] ocfs2: dont clear SGID when inheriting ACLs Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 033/106] powerpc/tm: Fix saving of TM SPRs in core dump Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 043/106] ARM: dts: armada-38x: Fix irq type for pca955 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 030/106] KVM: arm/arm64: Handle hva aging while destroying the vm Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 028/106] ASoC: ux500: Restore platform DAI assignments Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 015/106] mmc: core: Use device_property_read instead of of_property_read Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 027/106] ASoC: fix pcm-creation regression Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 037/106] gpiolib: skip unwanted events, dont convert them to opposite edge Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 036/106] ARM64: dts: marvell: armada-37xx: Fix the number of GPIO on south bridge Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 032/106] timers: Fix overflow in get_next_timer_interrupt Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 055/106] blk-mq: Create hctx for each present CPU Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 052/106] ext4: Dont clear SGID when inheriting ACLs Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 020/106] userfaultfd_zeropage: return -ENOSPC in case mm has gone Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 048/106] [media] ir-spi: Fix issues with lirc API Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
Re: [PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Johannes Thumshirn <jthumshirn@suse.de> - 2017-08-10 08:20 +0200
Re: [PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-10 17:20 +0200
Re: [PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Johannes Thumshirn <jthumshirn@suse.de> - 2017-08-11 09:20 +0200
Re: [PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-11 17:40 +0200
Re: [PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-11 21:40 +0200
Re: [PATCH 4.12 004/106] scsi: sg: fix SG_DXFER_FROM_DEV transfers Chris Clayton <chris2553@googlemail.com> - 2017-08-10 10:20 +0200
[PATCH 4.12 029/106] ASoC: do not close shared backend dailink Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 021/106] userfaultfd: non-cooperative: flush event_wqh at release time Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 053/106] Btrfs: fix early ENOSPC due to delalloc Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 011/106] iwlwifi: dvm: prevent an out of bounds access Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 034/106] powerpc/64: Fix __check_irq_replay missing decrementer interrupt Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 039/106] ext4: fix overflow caused by missing cast in ext4_resize_fs() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:20 +0200
[PATCH 4.12 003/106] scsi: lpfc: fix linking against modular NVMe support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 014/106] mmc: sdhci-of-at91: force card detect value for non removable devices Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 006/106] cgroup: dont call migration methods if there are no tasks to migrate Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 002/106] parisc: Handle vmas whose context is not current in flush_cache_range Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 009/106] libata: array underflow in ata_find_dev() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 010/106] workqueue: restore WQ_UNBOUND/max_active==1 to be ordered Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 005/106] ACPI / LPSS: Only call pwm_add_table() for the first PWM controller Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
[PATCH 4.12 008/106] cgroup: fix error return value from cgroup_subtree_control() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 19:30 +0200
Re: [PATCH 4.12 000/106] 4.12.6-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-09 23:50 +0200
Re: [PATCH 4.12 000/106] 4.12.6-stable review Kevin Hilman <khilman@baylibre.com> - 2017-08-10 17:50 +0200
Re: [PATCH 4.12 000/106] 4.12.6-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-08-10 02:20 +0200
Re: [PATCH 4.12 000/106] 4.12.6-stable review Guenter Roeck <linux@roeck-us.net> - 2017-08-10 02:50 +0200
Re: [PATCH 4.12 000/106] 4.12.6-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-10 04:40 +0200
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