| commit | 7eebcd2be6ac91a1c28ed6a2184efb81aa9aa2a4 | |
| author | Alexander Motin <mav@FreeBSD.org> | |
| Tue, 27 Jul 2021 23:05:47 +0000 (27 19:05 -0400) | ||
| committer | GitHub <noreply@github.com> | |
| Tue, 27 Jul 2021 23:05:47 +0000 (27 16:05 -0700) | ||
| tree | 841a24b362c0da167803ac6205242c8b9292b752 | treesnapshot (tar.gz zip) |
| parent | b72611f0f612bf9ffeda827ea0bdf4cc36d9c6e4 | commitdiff |
Avoid small buffer copying on write
It is wrong for arc_write_ready() to use zfs_abd_scatter_enabled to
decide whether to reallocate/copy the buffer, because the answer is
OS-specific and depends on the buffer size. Instead of that use
abd_size_alloc_linear(), moved into public header.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Closes #12425
It is wrong for arc_write_ready() to use zfs_abd_scatter_enabled to
decide whether to reallocate/copy the buffer, because the answer is
OS-specific and depends on the buffer size. Instead of that use
abd_size_alloc_linear(), moved into public header.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Closes #12425