On 07/17/2017 07:33 PM, John Snow wrote: > > > On 07/17/2017 07:30 PM, Andrew Baumann via Qemu-devel wrote: >> Hi all, >> >> I'm running a recent Linux build of qemu on Windows Subsystem for Linux >> (WSL) which doesn't appear to implement file locking: >> >> $ qemu-system-aarch64 ... -drive file=test.vhdx,if=none,id=hd0 -device >> virtio-blk-pci,drive=hd0 >> qemu-system-aarch64: -drive file=test.vhdx,if=none,id=hd0: Failed to unlock >> byte 100
Does WSL implement fcntl(F_SETLK) but not fcntl(F_OFD_SETLK)? We already have code in place for compiling when F_OFD_SETLK is not supported (which makes lock=auto do nothing, and issues a warning that F_SETLK locks may be ineffective when locks are explicitly requested), do we need to just expand that code into a runtime test of whether F_OFD_SETLK appears to be unsupported? -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
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