RE: [PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes
> -Original Message- > From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com] > Sent: Monday, April 18, 2016 5:59 AM > To: KY Srinivasan > Cc: linux-kernel@vger.kernel.org; Haiyang Zhang > ; Alex Ng (LIS) ; Cathy > Avery ; de...@linuxdriverproject.org > Subject: Re: [PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes > > Vitaly Kuznetsov writes: > > > Hi, > > > > I found an issue (crash) while testing memory hotplug on WS2016TP4 host. > > It should be easily reproducible with the following test sequence > > (4.6-rc2): > > > > 1) Start a VM with 4 vCPUs in 4 NUMA nodes, 4096Mb of RAM. > > 2) Enable memory auto onlining with > >'echo online > /sys/devices/system/memory/auto_online_blocks' > > 3) Wait till hv_balloon driver finishes negotiation. > > 4) Increase memory to 8192Mb. > > 5) Increase memory to 1Mb. > > > > The first patch in the series fixes the issue. While writing it I stumbled > > upon an unrelated issue which I fix with PATCH 2. > > K. Y., > > it seems these two patches were lost. Should I resend them? No I have them. I will be sending these soon. K. Y > > > > > Please review. > > > > Vitaly Kuznetsov (2): > > Drivers: hv: balloon: don't crash when memory is added in non-sorted > > order > > Drivers: hv: balloon: reset host_specified_ha_region > > > > drivers/hv/hv_balloon.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > -- > Vitaly
Re: [PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes
Vitaly Kuznetsov writes: > Hi, > > I found an issue (crash) while testing memory hotplug on WS2016TP4 host. > It should be easily reproducible with the following test sequence > (4.6-rc2): > > 1) Start a VM with 4 vCPUs in 4 NUMA nodes, 4096Mb of RAM. > 2) Enable memory auto onlining with >'echo online > /sys/devices/system/memory/auto_online_blocks' > 3) Wait till hv_balloon driver finishes negotiation. > 4) Increase memory to 8192Mb. > 5) Increase memory to 1Mb. > > The first patch in the series fixes the issue. While writing it I stumbled > upon an unrelated issue which I fix with PATCH 2. K. Y., it seems these two patches were lost. Should I resend them? > > Please review. > > Vitaly Kuznetsov (2): > Drivers: hv: balloon: don't crash when memory is added in non-sorted > order > Drivers: hv: balloon: reset host_specified_ha_region > > drivers/hv/hv_balloon.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) -- Vitaly
[PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes
Hi, I found an issue (crash) while testing memory hotplug on WS2016TP4 host. It should be easily reproducible with the following test sequence (4.6-rc2): 1) Start a VM with 4 vCPUs in 4 NUMA nodes, 4096Mb of RAM. 2) Enable memory auto onlining with 'echo online > /sys/devices/system/memory/auto_online_blocks' 3) Wait till hv_balloon driver finishes negotiation. 4) Increase memory to 8192Mb. 5) Increase memory to 1Mb. The first patch in the series fixes the issue. While writing it I stumbled upon an unrelated issue which I fix with PATCH 2. Please review. Vitaly Kuznetsov (2): Drivers: hv: balloon: don't crash when memory is added in non-sorted order Drivers: hv: balloon: reset host_specified_ha_region drivers/hv/hv_balloon.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) -- 2.5.5
[PATCH 0/2] Drivers: hv: balloon: Online memory segments "in context"
The current code depends on user level code to bring online memory segments that have been hot added. Change this code to online memory in the same context that is hot adding the memory. This patch set implements the necessary infrastructure for making it possible to online memory segments from within a driver. K. Y. Srinivasan (2): Drivers: base: memory: Export functionality for "in kernel" onlining of memory Drivers: hv: balloon: Online the hot-added memory "in context" drivers/base/memory.c | 35 +++ drivers/hv/hv_balloon.c | 20 +++- include/linux/memory.h |5 + 3 files changed, 43 insertions(+), 17 deletions(-) -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 0/2] Drivers: hv: balloon: Fix some issues in the balloon driver
This patch set adresses a couple of issues discovered in the balloon driver: 1. Prevent stale pressure report being posted. 2. If memory is not brought online within the allowed time, do not roll back hot add state if hot add succeeded. K. Y. Srinivasan (2): Drivers: hv: balloon: Fix a bug in the hot-add code Drivers: hv: balloon: Do not post pressure status if interrupted drivers/hv/hv_balloon.c | 18 ++ 1 files changed, 10 insertions(+), 8 deletions(-) -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 0/2] Drivers: hv: balloon
Support 2M page allocations when memory is ballooned out of the guest. Hyper-V Dynamic Memory protocol is optimized around the ability to move memory in 2M chunks. K. Y. Srinivasan (2): mm: Export split_page() Drivers: hv: balloon: Support 2M page allocations for ballooning drivers/hv/hv_balloon.c | 18 -- mm/page_alloc.c |1 + 2 files changed, 17 insertions(+), 2 deletions(-) -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 0/2] Drivers: hv: balloon
Make furher adjustments to memory pressure reporting and computation. In the current code, we begin to report pressure soon after the balloon driver loads and typically report a very low pressure until the system is fully operational. To avoid having the host take memory balancing decisions on data that does not fully reflect the memory pressure, delay reporting the pressure. Additionally, implement a floor for ballooning based on the amount of memory being managed. K. Y. Srinivasan (2): Drivers: hv: balloon: Add a parameter to delay pressure reporting Drivers: hv: balloon: Prevent the host from ballooning the guest too low drivers/hv/hv_balloon.c | 48 -- 1 files changed, 45 insertions(+), 3 deletions(-) -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
