Daniel Verkamp ec5916daa0 devices: virtio: block: use FileReadWriteAtVolatile ... Use the "at" variants of the read/write functions in the block device. This reduces the number of syscalls on the host per I/O to one (pread64/pwrite64) rather than two (lseek + read/write). The CompositeDiskFile implementation is also updated in this commit, since it's both a producer and consumer of DiskFile, and it isn't trivial to update it in a separate commit without breaking compilation. BUG=None TEST=Start Crostini on kevin, banon, and nami Change-Id: I031e7e87cd6c99504db8c56b1725ea51c1e27a53 Signed-off-by: Daniel Verkamp <dverkamp@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1845948 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Stephen Barber <smbarber@chromium.org>		2019-10-29 22:06:22 +00:00
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arm	devices: virtio: block: use FileReadWriteAtVolatile	2019-10-29 22:06:22 +00:00
x86_64	devices: virtio: block: use FileReadWriteAtVolatile	2019-10-29 22:06:22 +00:00