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author | Boris Burkov <boris@bur.io> | 2024-06-20 10:33:10 -0700 |
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committer | David Sterba <dsterba@suse.com> | 2024-07-11 15:33:26 +0200 |
commit | 33336c1805d3a03240afda0bfb8c8d20395fb1d3 (patch) | |
tree | 78fc6415f954e4e5297404af1ae93ae75b8a63a9 /tools/perf/scripts/python/export-to-postgresql.py | |
parent | 28cb13f29faf6290597b24b728dc3100c019356f (diff) |
btrfs: preallocate ulist memory for qgroup rsv
When qgroups are enabled, during data reservation, we allocate the
ulist_nodes that track the exact reserved extents with GFP_ATOMIC
unconditionally. This is unnecessary, and we can follow the model
already employed by the struct extent_state we preallocate in the non
qgroups case, which should reduce the risk of allocation failures with
GFP_ATOMIC.
Add a prealloc node to struct ulist which ulist_add will grab when it is
present, and try to allocate it before taking the tree lock while we can
still take advantage of a less strict gfp mask. The lifetime of that
node belongs to the new prealloc field, until it is used, at which point
it belongs to the ulist linked list.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions