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fix(apple): use explicit cached disk modes for Linux guests #144

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Merged
kerdofficial merged 1 commit into from
Nov 4, 2026
Merged

fix(apple): use explicit cached disk modes for Linux guests #144

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10 changes: 8 additions & 2 deletions native/apple/Sources/VectisVM/main.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,13 @@ final class Controller: NSObject, VZVirtualMachineDelegate, NSWindowDelegate {
} else {
throw HelperError(message: "Only linux and macos guests use the Apple helper.")
}
let attachment = try VZDiskImageStorageDeviceAttachment(url: disk, readOnly: false)
let attachment: VZDiskImageStorageDeviceAttachment
if os == "linux" {
// Explicit cached writes with full sync avoid Linux guest filesystem I/O errors.
attachment = try VZDiskImageStorageDeviceAttachment(url: disk, readOnly: false, cachingMode: .cached, synchronizationMode: .full)
} else {
attachment = try VZDiskImageStorageDeviceAttachment(url: disk, readOnly: false)
}
configuration.storageDevices = [VZVirtioBlockDeviceConfiguration(attachment: attachment)]
if arguments.count == 8 && arguments[7] != "--console" {
guard os == "linux" else { throw HelperError(message: "A setup seed is supported only for Linux.") }
Expand All @@ -116,7 +122,7 @@ final class Controller: NSObject, VZVirtualMachineDelegate, NSWindowDelegate {
if let cachePath {
let cacheURL = URL(fileURLWithPath: cachePath).standardizedFileURL
guard cacheURL != disk.standardizedFileURL else { throw HelperError(message: "The cache disk must differ from the boot disk.") }
let cacheAttachment = try VZDiskImageStorageDeviceAttachment(url: cacheURL, readOnly: false)
let cacheAttachment = try VZDiskImageStorageDeviceAttachment(url: cacheURL, readOnly: false, cachingMode: .cached, synchronizationMode: .full)
let cache = VZVirtioBlockDeviceConfiguration(attachment: cacheAttachment)
cache.blockDeviceIdentifier = "VECTISCACHE"
configuration.storageDevices.append(cache)
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