we're using LVM snapshots on our storage server to provide data for our live and staging instances. there are two mountpoints on the server, one for the origin volume, and one for the snapshot that are exported using NFS to our live/staging instances (webserver) today i noticed, that writes on our staging-webserver don't go to the snapshot as expected, but are hitting the origin volume, messing up
This was originally filed over here: https://bugzilla.redhat.com/show_bug.cgi?id=1114221 The open-unlink-fstat idiom used in some places to create an anonymous private temporary file does not work in a QEMU guest over a virtio-9p filesystem. Version-Release number of selected component (if applicable): qemu-kvm-1.6.2-6.fc20.x86_64 qemu-system-x86-1.6.2-6.fc20.x86_64 (those are fedora RPMs) How rep
arch/x86/include/asm/timer.h: #define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */ static inline unsigned long long __cycles_2_ns(unsigned long long cyc) { int cpu = smp_processor_id(); unsigned long long ns = per_cpu(cyc2ns_offset, cpu); ns += cyc * per_cpu(cyc2ns, cpu) >> CYC2NS_SCALE_FACTOR; // !!! return ns; } Apparently he or she was not very 'careful' to chose CYC2NS_SCALE_FACTOR. cyc
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