On 11/19/24 16:29, Michal Hocko wrote:
On Tue 19-11-24 15:24:03, Pavel Tikhomirov wrote:
[...]
In commit 451769ebb7e79 ("mm/vmalloc: alloc GFP_NO{FS,IO} for vmalloc") we
add implicit memalloc_noXX_save/memalloc_noXX_restore at this code path:
+->kvmalloc
+-> ...
+-> __kvmalloc_node_noprof
+-> __vmalloc_node_range_noprof
+-> __vmalloc_area_node
So kvmalloc should be safe now with GFP_NOIO.
Correct.
Should we correct the documentation?
Yes, please. I think it would be useful to explicitly name the above
commit because pre 5.17 kernels or those who haven't backported it are
still in same position and that could get dangerous if they try to
backport [k]vmalloc GFP_NOFS patches. Thanks!
Done
https://lore.kernel.org/lkml/20241119093922.567138-1-ptikhomirov@xxxxxxxxxxxxx/.
Thank you for confirming!
--
Best regards, Tikhomirov Pavel
Senior Software Developer, Virtuozzo.
