On Tue, Feb 21, 2023 at 10:02:34AM -0800, Christoph Hellwig wrote: > On Tue, Feb 21, 2023 at 08:54:00AM -0800, Keith Busch wrote: > > From: Keith Busch <kbusch@xxxxxxxxxx> > > > > Some users of the dmapool need their allocations to happen in ascending > > order. The recent optimizations pushed the blocks in reverse order, so > > restore the previous behavior by linking the next available block from > > low-to-high. > > Who are those users? > > Also should we document this behavior somewhere so that it isn't > accidentally changed again some time in the future? usb/chipidea/udc.c qh_pool called "ci_hw_qh". My initial thought was dmapool isn't the right API if you need a specific order when allocating from it, but I can't readily test any changes to that driver. Restoring the previous behavior is easy enough.
