- 02 3月, 2015 1 次提交
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由 Nicholas Mc Guire 提交于
return type of wait_for_completion_timeout is unsigned long not int, this patch changes the type of t from int to unsigned long. Signed-off-by: NNicholas Mc Guire <der.herr@hofr.at> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 26 1月, 2015 3 次提交
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由 K. Y. Srinivasan 提交于
We currently release memory (balloon down) in the interrupt context and we also post memory status while releasing memory. Rather than posting the status in the interrupt context, wakeup the status posting thread to post the status. This will address the inconsistent lock state that Sitsofe Wheeler <sitsofe@gmail.com> reported: http://lkml.iu.edu/hypermail/linux/kernel/1411.1/00075.htmlSigned-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reported-by: NSitsofe Wheeler <sitsofe@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
We support memory hot-add in the Hyper-V balloon driver by hot adding an appropriately sized and aligned region and controlling the on-lining of pages within that region based on the pages that the host wants us to online. We do this because the granularity and alignment requirements in Linux are different from what Windows expects. The state to manage the onlining of pages needs to be correctly protected. Fix this bug. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Make adjustments in computing the balloon floor. The current computation of the balloon floor was not appropriate for virtual machines with more than 10 GB of assigned memory - we would get into situations where the host would agressively balloon down the guest and leave the guest in an unusable state. This patch fixes the issue by raising the floor. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 27 11月, 2014 1 次提交
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由 Dexuan Cui 提交于
If num_ballooned is not 0, we shouldn't neglect the already-partially-allocated 2MB memory block(s). Signed-off-by: NDexuan Cui <decui@microsoft.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Acked-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 04 5月, 2014 1 次提交
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由 K. Y. Srinivasan 提交于
The current code posts periodic memory pressure status from a dedicated thread. Under some conditions, especially when we are releasing a lot of memory into the guest, we may not send timely pressure reports back to the host. Fix this issue by reporting pressure in all contexts that can be active in this driver. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Cc: stable@vger.kernel.org Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 16 2月, 2014 1 次提交
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由 K. Y. Srinivasan 提交于
The non-interruptible sleep of the memory pressure posting thread results in higher reported load average. Make this sleep interruptible. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 02 8月, 2013 1 次提交
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由 Olaf Hering 提交于
Remove HV_DRV_VERSION, it has no meaning for upstream drivers. Initially it was supposed to show the "Linux Integration Services" version, now it is not in sync anymore with the out-of-tree drivers available from the MSFT website. The only place where a version string is still required is the KVP command "IntegrationServicesVersion" which is handled by tools/hv/hv_kvp_daemon.c. To satisfy such KVP request from the host pass the current string to the daemon during KVP userland registration. Signed-off-by: NOlaf Hering <olaf@aepfle.de> Acked-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 27 7月, 2013 1 次提交
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由 K. Y. Srinivasan 提交于
Each message sent from the guest carries with it a transaction ID. Assign the transaction ID just before putting the message on the VMBUS. This would help in debugging on the host side. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 17 7月, 2013 2 次提交
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由 K. Y. Srinivasan 提交于
When we are posting pressure status, we may get interrupted and handle the un-balloon operation. In this case just don't post the status as we know the pressure status is stale. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Cc: Stable <stable@vger.kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
As we hot-add 128 MB chunks of memory, we wait to ensure that the memory is onlined before attempting to hot-add the next chunk. If the udev rule for memory hot-add is not executed within the allowed time, we would rollback the state and abort further hot-add. Since the hot-add has succeeded and the only failure is that the memory is not onlined within the allowed time, we should not be rolling back the state. Fix this bug. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Cc: Stable <stable@vger.kernel.org> Acked-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 30 3月, 2013 2 次提交
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由 K. Y. Srinivasan 提交于
If memory hot-add fails with the error -EEXIST, then this is a permanent failure. Notify the host of this information, so the host will not attempt hot-add again. If the failure were a transient failure, host will attempt a hot-add after some delay. In this version of the patch, I have added some additional comments to clarify how the host treats different failure conditions. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
On Hyper-V it will be very efficient to use 2M allocations in the guest as this makes the ballooning protocol with the host that much more efficient. Hyper-V uses page ranges (start pfn : number of pages) to specify memory being moved around and with 2M pages this encoding can be very efficient. However, when memory is returned to the guest, the host does not guarantee any granularity. To deal with this issue, split the page soon after a successful 2M allocation so that this memory can potentially be freed as 4K pages. If 2M allocations fail, we revert to 4K allocations. In this version of the patch, based on the feedback from Michal Hocko <mhocko@suse.cz>, I have added some additional commentary to the patch description. Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 29 3月, 2013 1 次提交
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由 K. Y. Srinivasan 提交于
Some Windows hosts permit the guest to specify memory hot-add alignment requirements (if any). Linux currently requires a 128MB alignment on memory segments that can be hot-added. Specify this alignment requirement to the host. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 26 3月, 2013 1 次提交
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由 Wei Yongjun 提交于
local functions that could be static. Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 16 3月, 2013 5 次提交
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由 K. Y. Srinivasan 提交于
Implement the memory hot-add functionality. With this, Linux guests can fully participate in the Dynamic Memory protocol implemented in the Windows hosts. In this version of the patch, based Olaf Herring's feedback, I have gotten rid of the module level dependency on MEMORY_HOTPLUG. Instead the code within the driver that depends on MEMORY_HOTPLUG has the appropriate compilation switches. This would allow this driver to support pure ballooning in cases where the kernel does not support memory hotplug. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
The balloon driver is stateful. For instance, it needs to keep track of pages that have been ballooned out to properly post pressure reports. This state cannot be re-constructed if the driver were to be unloaded and subsequently loaded. Furthermore, as we support memory hot-add as part of this driver, this driver becomes even more stateful and this state cannot be re-created. Make the balloon driver unloadable to deal with this issue. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Execute the hot-add operation in a separate work context. This allows us to decouple the pressure reporting activity from the "hot-add" activity. Testing has shown that this makes the guest more responsive to hot add requests. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Execute the balloon inflation operation in a separate work context. This allows us to decouple the pressure reporting activity from the ballooning activity. Testing has shown that this decoupling makes the guest more reponsive. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
There is no need to request completion notification; get rid of it. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 09 2月, 2013 2 次提交
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由 K. Y. Srinivasan 提交于
Based on the amount of memory being managed set a floor on how low the guest can be ballooned. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Delay reporting memory pressure by a specified amount of time. This addresses the problem where the host may take memory balancing decisions based on incorrect memory pressure data that will be posted as soon as the balloon driver is loaded. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 30 1月, 2013 1 次提交
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由 K. Y. Srinivasan 提交于
The host expects that the pressure report includes the pressure due to the pages that have been ballooned. Make necessary adjustments to reflect that. Also, include the free memory information in the pressure report. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 26 1月, 2013 1 次提交
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由 K. Y. Srinivasan 提交于
Use the consolidated GUID definitions in the util and balloon drivers. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 18 1月, 2013 3 次提交
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由 K. Y. Srinivasan 提交于
The send buffer was being leaked; fix it. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Reported-by: NJason Wang <jasowang@redhat.com> Acked-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
There is bug in the definition of struct dm_info_msg. This patch fixes the definition of this structure and makes the corresponding adjustments. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Wei Yongjun 提交于
Remove duplicated include. Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 22 11月, 2012 1 次提交
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由 Greg Kroah-Hartman 提交于
This resolves the following sparse warning: drivers/hv/hv_balloon.c:548:6: sparse: symbol 'free_balloon_pages' was not declared. Should it be static? Reported-by: NXie ChanglongX <changlongx.xie@intel.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 16 11月, 2012 1 次提交
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由 K. Y. Srinivasan 提交于
Add the basic balloon driver. Windows hosts dynamically manage the guest memory allocation via a combination memory hot add and ballooning. Memory hot add is used to grow the guest memory upto the maximum memory that can be allocatted to the guest. Ballooning is used to both shrink as well as expand up to the max memory. Supporting hot add needs additional support from the host. We will support hot add when this support is available. For now, by setting the VM startup memory to the VM max memory, we can use ballooning alone to dynamically manage memory allocation amongst competing guests on a given host. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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