Re: [PATCH v2 4/5] swapfile: use ->read_iter and ->write_iter

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Dec 19, 2014 at 07:18:28PM -0800, Omar Sandoval wrote:

> +		ret = swap_file->f_op->read_iter(&kiocb, &to);
> +		if (ret == PAGE_SIZE) {
> +			SetPageUptodate(page);
>  			count_vm_event(PSWPIN);
> +			ret = 0;
> +		} else {
> +			ClearPageUptodate(page);
> +			SetPageError(page);
> +		}
> +		unlock_page(page);

Umm...  What's to guarantee that ->read_iter() won't try lock_page() on what
turns out to be equal to page?
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Filesystem Development]     [Linux USB Development]     [Linux Media Development]     [Video for Linux]     [Linux NILFS]     [Linux Audio Users]     [Yosemite Info]     [Linux SCSI]

  Powered by Linux