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| author | Jason Gunthorpe <jgg@nvidia.com> | 2026-03-13 14:41:05 -0300 |
|---|---|---|
| committer | Vivek Kasireddy <vivek.kasireddy@intel.com> | 2026-03-30 17:47:26 -0700 |
| commit | 5bf888673e0dda5a53220fa0c4956271a46c353c (patch) | |
| tree | f96f62acb9a3210ecdad4c282c14e73a169f21e3 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | dac97a6bd6c4a24e60a147cb2cf750eddb7594a8 (diff) | |
udmabuf: Do not create malformed scatterlists
Using a sg_set_folio() loop for every 4K results in a malformed scatterlist
because sg_set_folio() has an issue with offsets > PAGE_SIZE and because
scatterlist expects the creator to build a list which consolidates any
physical contiguity.
sg_alloc_table_from_pages() creates a valid scatterlist directly from a
struct page array, so go back to that.
Remove the offsets allocation and just store an array of tail pages as it
did before the below commit. Everything wants that anyhow.
Fixes: 0c8b91ef5100 ("udmabuf: add back support for mapping hugetlb pages")
Reported-by: Julian Orth <ju.orth@gmail.com>
Closes: https://lore.kernel.org/all/20260308-scatterlist-v1-1-39c4566b0bba@gmail.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: https://patch.msgid.link/0-v1-42779f29381a+4b9-udmabuf_sg_jgg@nvidia.com
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions