Re: [PATCH 6.6.y] maple_tree: do not preallocate nodes for slot stores

[Greg KH]

On Tue, Dec 12, 2023 at 11:52:55AM -0800, Sidhartha Kumar wrote:
> mas_preallocate() defaults to requesting 1 node for preallocation and then
> ,depending on the type of store, will update the request variable. There
> isn't a check for a slot store type, so slot stores are preallocating the
> default 1 node. Slot stores do not require any additional nodes, so add a
> check for the slot store case that will bypass node_count_gfp(). Update
> the tests to reflect that slot stores do not require allocations.
> 
> User visible effects of this bug include increased memory usage from the
> unneeded node that was allocated.
> 
> Fixes: 0b8bb544b1a7 ("maple_tree: update mas_preallocate() testing")
> Cc: <stable@xxxxxxxxxxxxxxx> # 6.6+
> Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
> ---
> This is a modified backport as the patch to fix this in upstream does not
> apply to 6.6 because the node_end field was moved from the ma_wr_state to
> the ma_state after 6.6.

What is the git commit id of this change in Linus's tree?

thanks,

greg k-h