The number of io_event in AIO event queue allowed currently is no more
than 2^32-1, because the syscall defines:
asmlinkage long sys_io_setup(unsigned nr_events, aio_context_t __user
*ctxp)
We internally allocate a ring buffer for nr_events and keeps tracks of
page descriptors for each of these ring buffer pages. Since page size
is significantly larger than AIO event size (4096 versus 32), I don't
think it is ever possible to overflow nr_pages in 32-bit quantity.
This patch changes nr_pages to unsigned int. on 64-bit arch, changing
it to unsigned int also allows better packing of aio_ring_info structure.
Signed-off-by: Ken Chen <[EMAIL PROTECTED]>
--- ./include/linux/aio.h.orig 2006-12-24 22:31:55.000000000 -0800
+++ ./include/linux/aio.h 2006-12-24 22:41:28.000000000 -0800
@@ -165,7 +165,7 @@ struct aio_ring_info {
struct page **ring_pages;
spinlock_t ring_lock;
- long nr_pages;
+ unsigned nr_pages;
unsigned nr, tail;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
