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f93cbe5756
guestfs_mount adds -o sync implicitly. This causes a very large performance problem for write-intensive programs (eg. virt-v2v). Document this as a "gotcha". Change the tests, guestfish, Sys::Guestfs::Lib, guestmount to use mount-options instead. (Note that this gotcha does not affect mount-ro). The source of the performance problem was first identified by Matthew Booth.
Sys::Guestfs ------------ This directory contains the Perl bindings for the libguestfs API. The basic libguestfs bindings have the name 'Sys::Guestfs'. As with all other language bindings, these bindings are generated automatically. See src/generator.ml. Sys::Guestfs::Lib ----------------- Because we use Perl for writing lots of additional tools around libguestfs, the Perl bindings also contain an extra library of useful functions, called 'Sys::Guestfs::Lib'. This extra library is entirely optional, and only enhances the usefulness of the ordinary libguestfs API. One of the features of this library is tighter libvirt integration.