add logic to stack lcow layers on a single VPMEM device #930
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It might be good if you could make an issue on hcsshim for this and describe the memory allocation method and any other additional big changes proposed here. |
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katiewasnothere
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add VirtualPMemMapping schema and update gcs types add memory allocator interface and implementation VPMem multi-mapping support has been added in 19H1, which enables packing multiple VHDs onto a single VPMem device. This feature enables an optimization, where multiple LCOW container layers can be packed onto a single VPMem device. This change uses memory allocator introduced above to keep track of the VPMem surface allocation. Additionally, introduce new structs to keep track of the internal state of each mapped LCOW layer VHD and update HCS/GCS calls accordingly. The optimization is enabled by default on supported systems and fall-back to old behavior otherwise. add CRI tests Signed-off-by: Maksim An <maksiman@microsoft.com>
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The force push was fixing some edgecases I think you said this morning? |
yeah, I added one more test case to cover rootfs.vhd vs initrd (it was defaulting to only do rootfs) |
TBBle
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This was left behind due to an unlucky conflict between microsoft#1004 and microsoft#930. The file already existed with the same content at the new location, and nothing was referencing this location, so a trivial deletion. Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
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Related work items: microsoft#930, microsoft#962, microsoft#1004, microsoft#1008, microsoft#1039, microsoft#1045, microsoft#1046, microsoft#1047, microsoft#1052, microsoft#1053, microsoft#1054, microsoft#1057, microsoft#1058, microsoft#1060, microsoft#1061, microsoft#1063, microsoft#1064, microsoft#1068, microsoft#1069, microsoft#1070, microsoft#1071, microsoft#1074, microsoft#1078, microsoft#1079, microsoft#1081, microsoft#1082, microsoft#1083, microsoft#1084, microsoft#1088, microsoft#1090, microsoft#1091, microsoft#1093, microsoft#1094, microsoft#1096, microsoft#1098, microsoft#1099, microsoft#1102, microsoft#1103, microsoft#1105, microsoft#1106, microsoft#1108, microsoft#1109, microsoft#1115, microsoft#1116, microsoft#1122, microsoft#1123, microsoft#1126
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…pper add logic to stack lcow layers on a single VPMEM device
princepereira
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This was left behind due to an unlucky conflict between microsoft#1004 and microsoft#930. The file already existed with the same content at the new location, and nothing was referencing this location, so a trivial deletion. Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
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This PR adds logic to reuse an existing VPMEM device and stack multiple LCOW layers onto it.
The change depends on microsoft/opengcs#389
More background in #940
Signed-off-by: Maksim An maksiman@microsoft.com