Hello Roland,
is it possible that the "force" and write" parameter for the function
get_user_pages are interchanged.
The signature of get_user_pages is:
int get_user_pages(struct task_struct *tsk,
struct mm_struct *mm,
unsigned long start,
int len,
int write, <<<<<
int force, <<<<<
struct page **pages,
struct vm_area_struct **vmas)
The usage in uverbs_mem.c in function ib_umem_get (line 110) is:
ret = get_user_pages(current,
current->mm, cur_base,
min_t(int, npages,
PAGE_SIZE / sizeof (struct page *)),
1, <<<< IS WRITE ???
!write, <<<< IS FORCE ???
page_list,
NULL);
If that is the case, I think the problem was not seen, because ib_umem_get
was only used with the "write" flag at the moment.
--
Mit freundlichen Gruessen / Kind Regards
Heiko Joerg Schick
----------------------------------------------------------------------
Heiko J Schick
I/O Firmware Development II
Linux InfiniBand Device Drivers
IBM Deutschland Entwicklung GmbH external: 49-07031-16-0 x4219
Schoenaicher Str. 220 t/l: 120-4129
71032 Boeblingen email: [EMAIL PROTECTED]
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