moonjuice/kernel_arpi
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf,mm: Handle non-page-table-aligned hugetlbfs

Browse Source 
A limited nunmber of architectures support hugetlbfs sizes that do not
align with the page-tables (ARM64, Power, Sparc64). Add support for
this to the generic perf_get_page_size() implementation, and also
allow an architecture to override this implementation.

This latter is only needed when it uses non-page-table aligned huge
pages in its kernel map.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Peter Zijlstra
2020-10-09 11:09:27 +02:00
parent 995f088efe
commit 51b646b2d9
2 changed files with 37 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/perf_event.h
View File

@@ -1590,4 +1590,8 @@ extern void __weak arch_perf_update_userpage(struct perf_event *event,
struct perf_event_mmap_page *userpg,
u64 now);
#ifdef CONFIG_MMU
extern __weak u64 arch_perf_get_page_size(struct mm_struct *mm, unsigned long addr);
#endif
#endif /* _LINUX_PERF_EVENT_H */