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DDT: Make children writes inherit allocator

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Even though unlike gang children it is not so critical for dedup
children to inherit parent's allocator, there is still no reason
for them to have allocation policy different from normal writes.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com>
Closes #17961
This commit is contained in:
Alexander Motin 2025-12-01 13:30:27 -05:00 • committed by GitHub
parent 9a453b2050
commit 48f33c1ef2
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 4 additions and 3 deletions
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7
module/zfs/zio.c
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@ -3088,7 +3088,7 @@ zio_gang_issue(zio_t *zio)
}
static void
zio_gang_inherit_allocator(zio_t *pio, zio_t *cio)
zio_inherit_allocator(zio_t *pio, zio_t *cio)
{
cio->io_allocator = pio->io_allocator;
}
@ -3223,7 +3223,7 @@ zio_write_gang_block(zio_t *pio, metaslab_class_t *mc)
zio_write_gang_done, NULL, pio->io_priority,
ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
zio_gang_inherit_allocator(pio, zio);
zio_inherit_allocator(pio, zio);
if (pio->io_flags & ZIO_FLAG_ALLOC_THROTTLED) {
boolean_t more;
VERIFY(metaslab_class_throttle_reserve(mc, zio->io_allocator,
@ -3285,7 +3285,7 @@ zio_write_gang_block(zio_t *pio, metaslab_class_t *mc)
(allocated ? ZIO_FLAG_PREALLOCATED : 0), &pio->io_bookmark);
resid -= psize;
zio_gang_inherit_allocator(zio, cio);
zio_inherit_allocator(zio, cio);
if (allocated) {
metaslab_trace_move(&cio_list, &cio->io_alloc_list);
metaslab_group_alloc_increment_all(spa,
@ -4062,6 +4062,7 @@ zio_ddt_write(zio_t *zio)
zio_ddt_child_write_ready, NULL,
zio_ddt_child_write_done, dde, zio->io_priority,
ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
zio_inherit_allocator(zio, cio);
zio_push_transform(cio, zio->io_abd, zio->io_size, 0, NULL);