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Merged
pull merged 2 commits into from
Aug 13, 2026
Merged

[pull] main from actions:main #326

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66ac37e
[Ubuntu] Extend read_ahead_kb rule to NVMe devices (#14553)
v-GeorgyPuzakov Aug 13, 2026
ca3228e
[MacOS] Update XCode 27 to Beta 5 (#14557)
v-SergeiRadich Aug 13, 2026
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63 changes: 5 additions & 58 deletions images/macos/toolsets/toolset-xcode-27.json
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Original file line number Diff line number Diff line change
@@ -1,36 +1,20 @@
{
"xcode": {
"default": "27_beta_4",
"x64": {
"versions": [
{
"link": "27_beta_4",
"filename": "Xcode_27_beta_4",
"version": "27.0+27A5228h",
"symlinks": ["27.0"],
"sha256": "808582beef282213b3a5a1132338ea7f866010a819543fcc91ab12f24c15919d",
"install_runtimes": "default"
}
]
},
"default": "27_beta_5",
"arm64": {
"versions": [
{
"link": "27_beta_4",
"filename": "Xcode_27_beta_4",
"version": "27.0+27A5228h",
"link": "27_beta_5",
"filename": "Xcode_27_beta_5",
"version": "27.0+27A5237l",
"symlinks": ["27.0"],
"sha256": "808582beef282213b3a5a1132338ea7f866010a819543fcc91ab12f24c15919d",
"sha256": "1f92c0fbb7268205e9b1f8061bf47db012a92e47729557c79ac053c9e5bd881a",
"install_runtimes": "default"
}
]
}
},
"java": {
"x64": {
"default": "21",
"versions": [ "11", "17", "21", "25" ]
},
"arm64": {
"default": "21",
"versions": [ "11", "17", "21", "25" ]
Expand Down Expand Up @@ -106,13 +90,6 @@
},
"dotnet": {
"arch":{
"x64": {
"versions": [
"8.0",
"9.0",
"10.0"
]
},
"arm64": {
"versions": [
"8.0",
Expand All @@ -137,14 +114,6 @@
"url" : "https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json",
"platform" : "darwin",
"arch": {
"x64": {
"versions": [
"3.11.*",
"3.12.*",
"3.13.*",
"3.14.*"
]
},
"arm64": {
"versions": [
"3.11.*",
Expand All @@ -160,12 +129,6 @@
"url" : "https://raw.githubusercontent.com/actions/node-versions/main/versions-manifest.json",
"platform" : "darwin",
"arch": {
"x64": {
"versions": [
"22.*",
"24.*"
]
},
"arm64": {
"versions": [
"22.*",
Expand All @@ -179,14 +142,6 @@
"url" : "https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json",
"platform" : "darwin",
"arch": {
"x64": {
"variable_template" : "GOROOT_{0}_{1}_X64",
"versions": [
"1.24.*",
"1.25.*",
"1.26.*"
]
},
"arm64": {
"variable_template" : "GOROOT_{0}_{1}_ARM64",
"versions": [
Expand All @@ -200,14 +155,6 @@
{
"name": "Ruby",
"arch": {
"x64": {
"versions": [
"3.2.*",
"3.3.*",
"3.4.*",
"4.0.*"
]
},
"arm64": {
"versions": [
"3.2.*",
Expand Down
3 changes: 2 additions & 1 deletion images/ubuntu/scripts/build/configure-environment.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -57,9 +57,10 @@ echo 'ACTION=="add", SUBSYSTEM=="module", KERNEL=="nf_conntrack", RUN+="/usr/sbi
# Linux kernel 6.17 changed read_ahead_kb default from 128 to 4096 on Azure VMs
# where disks are presented as rotational (ROTA=1). This floods the page cache
# with unused data during random-access I/O and causes memory exhaustion and thrashing.
# Azure v4 VM series use SCSI disks (sd*); v5/v6 use NVMe namespaces (nvme*n*).
if ! is_ubuntu22; then
readahead_rule='/etc/udev/rules.d/99-readahead.rules'
echo 'ACTION=="add|change", KERNEL=="sd*", ATTR{queue/read_ahead_kb}="128"' | tee "$readahead_rule"
echo 'ACTION=="add|change", KERNEL=="sd*|nvme*n*", ATTR{queue/read_ahead_kb}="128"' | tee "$readahead_rule"
fi

# Create symlink for tests running
Expand Down
9 changes: 5 additions & 4 deletions images/ubuntu/scripts/tests/System.Tests.ps1
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Original file line number Diff line number Diff line change
Expand Up @@ -30,14 +30,15 @@ Describe "ReadAhead udev rule" -Skip:(Test-IsUbuntu22) {
"/etc/udev/rules.d/99-readahead.rules" | Should -Exist
}

It "udev rule contains correct read_ahead_kb value" {
It "udev rule covers SCSI and NVMe devices with correct read_ahead_kb value" {
$content = Get-Content "/etc/udev/rules.d/99-readahead.rules" -Raw
$content | Should -Match 'KERNEL=="sd\*\|nvme\*n\*"'
$content | Should -Match 'ATTR\{queue/read_ahead_kb\}="128"'
}

It "All sd* devices have read_ahead_kb set to 128" {
$devices = Get-ChildItem "/sys/block/sd*/queue/read_ahead_kb" -ErrorAction SilentlyContinue
$devices | Should -Not -BeNullOrEmpty -Because "there should be at least one sd* block device"
It "All SCSI and NVMe devices have read_ahead_kb set to 128" {
$devices = Get-ChildItem "/sys/block/sd*/queue/read_ahead_kb", "/sys/block/nvme*n*/queue/read_ahead_kb" -ErrorAction SilentlyContinue
$devices | Should -Not -BeNullOrEmpty -Because "there should be at least one sd* or nvme* block device"
foreach ($dev in $devices) {
$value = (Get-Content $dev.FullName).Trim()
$value | Should -Be "128" -Because "read_ahead_kb for $($dev.FullName) should be 128 to prevent I/O thrashing"
Expand Down
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