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Update Microsoft.WSL.Kernel to 6.18.20.1 #40161

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Update Microsoft.WSL.Kernel to 6.18.20.1 #40161

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01e1b22
Update Microsoft.WSL.Kernel to 6.18.20.1
chessturo Apr 10, 2026
09c5e02
Merge branch 'master' into user/chessturo/6.18.20.1-update
OneBlue Apr 11, 2026
f217a58
update mount options to match 6.18 expected format
Apr 13, 2026
2a21f7b
more test adjustments to account for 6.18 behavior
Apr 13, 2026
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2 changes: 1 addition & 1 deletion packages.config
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@
<package id="Microsoft.WSL.Dependencies.amd64fre" version="10.0.27820.1000-250318-1700.rs-base2-hyp" targetFramework="native" />
<package id="Microsoft.WSL.Dependencies.arm64fre" version="10.0.27820.1000-250318-1700.rs-base2-hyp" targetFramework="native" />
<package id="Microsoft.WSL.DeviceHost" version="1.2.10-0" />
<package id="Microsoft.WSL.Kernel" version="6.6.114.1-1" targetFramework="native" />
<package id="Microsoft.WSL.Kernel" version="6.18.20.1-1" targetFramework="native" />
<package id="Microsoft.WSL.LinuxSdk" version="1.20.0" targetFramework="native" />
<package id="Microsoft.WSL.TestDistro" version="2.7.1-1" />
<package id="Microsoft.WSLg" version="1.0.73" />
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4 changes: 2 additions & 2 deletions test/linux/unit_tests/lxtfs.c
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Expand Up @@ -285,7 +285,7 @@ Return Value:
snprintf(
Plan9Options,
sizeof(Plan9Options),
"aname=drvfs;path=%s%s;symlinkroot=/mnt/,cache=5,access=client,msize=262144,trans=virtio",
"aname=drvfs;path=%s%s;symlinkroot=/mnt/,cache=0x5,access=client,msize=262144,trans=virtio",
Plan9Source,
Temp);
Comment on lines 285 to 290
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Copilot AI Apr 13, 2026

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The cache=0x5 literal is duplicated across multiple option strings, and hard-codes a particular textual representation that may vary by kernel/userspace. To reduce future churn, consider centralizing the cache option formatting (e.g., a shared constant or helper that can emit either decimal/hex or accept a parameter), or making the test/consumer tolerant of either representation.

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}
Expand All @@ -294,7 +294,7 @@ Return Value:
snprintf(
Plan9Options,
sizeof(Plan9Options),
"aname=drvfs;path=%s%s;symlinkroot=/mnt/,cache=5,access=client,msize=65536,trans=fd,rfd=*,wfd=*",
"aname=drvfs;path=%s%s;symlinkroot=/mnt/,cache=0x5,access=client,msize=65536,trans=fd,rfd=*,wfd=*",
Plan9Source,
Temp);
Comment on lines 294 to 299
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Copilot AI Apr 13, 2026

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The cache=0x5 literal is duplicated across multiple option strings, and hard-codes a particular textual representation that may vary by kernel/userspace. To reduce future churn, consider centralizing the cache option formatting (e.g., a shared constant or helper that can emit either decimal/hex or accept a parameter), or making the test/consumer tolerant of either representation.

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}
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2 changes: 1 addition & 1 deletion test/windows/UnitTests.cpp
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Expand Up @@ -1774,7 +1774,7 @@ Error code: Wsl/InstallDistro/WSL_E_DISTRO_NOT_FOUND
VERIFY_ARE_EQUAL(
LxsstuLaunchWsl(
L"mount | grep -iF '" TEXT(
LXSS_GPU_DRIVERS_SHARE) L" on /usr/lib/wsl/drivers type 9p (ro,nosuid,nodev,noatime,aname=" TEXT(LXSS_GPU_DRIVERS_SHARE) L";fmask=222;dmask=222,cache=5,access=client,msize=65536,trans=fd,rfd=8,wfd=8)'",
LXSS_GPU_DRIVERS_SHARE) L" on /usr/lib/wsl/drivers type 9p (ro,nosuid,nodev,noatime,aname=" TEXT(LXSS_GPU_DRIVERS_SHARE) L";fmask=222;dmask=222,cache=0x5,access=client,msize=65536,trans=fd,rfd=8,wfd=8)'",
nullptr,
nullptr,
nullptr,
Comment on lines 1774 to 1780
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Copilot AI Apr 13, 2026

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This assertion is now brittle to formatting differences in mount output (e.g., some environments may print cache=5 instead of cache=0x5, or reorder mount options). Consider loosening the check to accept both forms (e.g., cache=(5|0x5)) and/or validating only the specific invariants you care about (mount point + aname + key options) rather than an exact full option string.

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