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ABD changes for vectorized RAIDZ

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* userspace: aligned buffers. Minimum of 32B alignment is
  needed for AVX2. Kernel buffers are aligned 512B or more.
* add abd_get_offset_size() interface
* abd_iter_map(): fix calculation of iter_mapsize
* add abd_raidz_gen_iterate() and abd_raidz_rec_iterate()

Signed-off-by: Gvozden Neskovic <neskovic@gmail.com>
This commit is contained in:
Gvozden Neskovic
2016-08-24 15:42:51 +02:00
committed by Brian Behlendorf
parent b0be93e81a
commit a206522c4f
3 changed files with 210 additions and 14 deletions
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module/zfs/vdev_raidz.c
+10 -6
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@@ -243,8 +243,9 @@ vdev_raidz_cksum_finish(zio_cksum_report_t *zcr, const void *good_data)
offset = 0;
for (x = rm->rm_firstdatacol; x < rm->rm_cols; x++) {
abd_put(rm->rm_col[x].rc_abd);
rm->rm_col[x].rc_abd = abd_get_offset(
rm->rm_abd_copy, offset);
rm->rm_col[x].rc_abd = abd_get_offset_size(
rm->rm_abd_copy, offset,
rm->rm_col[x].rc_size);
offset += rm->rm_col[x].rc_size;
}
}
@@ -310,7 +311,8 @@ vdev_raidz_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *arg)
for (offset = 0, c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
raidz_col_t *col = &rm->rm_col[c];
abd_t *tmp = abd_get_offset(rm->rm_abd_copy, offset);
abd_t *tmp = abd_get_offset_size(rm->rm_abd_copy, offset,
col->rc_size);
abd_copy(tmp, col->rc_abd, col->rc_size);
abd_put(col->rc_abd);
@@ -432,13 +434,15 @@ vdev_raidz_map_alloc(zio_t *zio, uint64_t unit_shift, uint64_t dcols,
for (c = 0; c < rm->rm_firstdatacol; c++)
rm->rm_col[c].rc_abd =
abd_alloc_linear(rm->rm_col[c].rc_size, B_TRUE);
abd_alloc_linear(rm->rm_col[c].rc_size, B_FALSE);
rm->rm_col[c].rc_abd = abd_get_offset(zio->io_abd, 0);
rm->rm_col[c].rc_abd = abd_get_offset_size(zio->io_abd, 0,
rm->rm_col[c].rc_size);
off = rm->rm_col[c].rc_size;
for (c = c + 1; c < acols; c++) {
rm->rm_col[c].rc_abd = abd_get_offset(zio->io_abd, off);
rm->rm_col[c].rc_abd = abd_get_offset_size(zio->io_abd, off,
rm->rm_col[c].rc_size);
off += rm->rm_col[c].rc_size;
}