checkout/commit: Use glnx_regfile_copy_bytes() if possible

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Rather than `g_output_stream_splice()`, where the input is a regular
file.

See https://github.com/GNOME/libglnx/pull/44 for some more information.

I didn't try to measure the performance difference, but seeing the
read()/write() to/from userspace mixed in with the pointless `poll()` annoyed me
when reading strace.

As a bonus, we will again start using reflinks (if available) for `/etc`,
which is a regression from the https://github.com/ostreedev/ostree/pull/797
changes (which before used `glnx_file_copy_at()`).

Also, for the first time we'll use reflinks when doing commits from file-backed
content. This happens in `rpm-ostree compose tree` today for example.

Update submodule: libglnx

Closes: #817
Approved by: jlebon

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This commit is contained in:

Colin Walters authored and Atomic Bot committed 2017-05-10 15:10:30 +00:00

1 parent 05fda71cb1

commit 63497c65f3

4 files changed

+58 -50

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libglnx

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Submodule libglnx updated: 602fdd93cb...3a4d0f4684.