Background information can be checked in cover letter of v2 RESEND POST as below: https://lore.kernel.org/all/20211207030750.30824-1-bhe@xxxxxxxxxx/T/#u Changelog: v2-Resend -> v3: - Re-implement has_managed_dma() according to David's suggestion. - Add Fixes tag and cc stable. v2->v2 RESEND: - John pinged to push the repost of this patchset. So fix one typo of suject of patch 3/5; Fix a building error caused by mix declaration in patch 5/5. Both of them are found by John from his testing. - Rewrite cover letter to add more information. v1->v2: Change to check if managed DMA zone exists. If DMA zone has managed pages, go further to request page from DMA zone to initialize. Otherwise, just skip to initialize stuffs which need pages from DMA zone. V2 RESEND post: https://lore.kernel.org/all/20211207030750.30824-1-bhe@xxxxxxxxxx/T/#u v2 post: https://lore.kernel.org/all/20210810094835.13402-1-bhe@xxxxxxxxxx/T/#u v1 post: https://lore.kernel.org/all/20210624052010.5676-1-bhe@xxxxxxxxxx/T/#u Baoquan He (5): docs: kernel-parameters: Update to reflect the current default size of atomic pool dma-pool: allow user to disable atomic pool mm_zone: add function to check if managed dma zone exists dma/pool: create dma atomic pool only if dma zone has managed pages mm/slub: do not create dma-kmalloc if no managed pages in DMA zone Documentation/admin-guide/kernel-parameters.txt | 5 ++++- include/linux/mmzone.h | 9 +++++++++ kernel/dma/pool.c | 11 +++++++---- mm/page_alloc.c | 15 +++++++++++++++ mm/slab_common.c | 9 +++++++++ 5 files changed, 44 insertions(+), 5 deletions(-) -- 2.17.2
