On Thu 04-08-11 11:09:48, Bob Liu wrote:
> This patch also add checking whether alloc frontswap_map memory
> failed.
>
> Signed-off-by: Bob Liu <lliubbo@xxxxxxxxx>
> ---
> mm/swapfile.c | 6 +++---
> 1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/mm/swapfile.c b/mm/swapfile.c
> index ffdd06a..8fe9e88 100644
> --- a/mm/swapfile.c
> +++ b/mm/swapfile.c
> @@ -2124,9 +2124,9 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
> }
> /* frontswap enabled? set up bit-per-page map for frontswap */
> if (frontswap_enabled) {
> - frontswap_map = vmalloc(maxpages / sizeof(long));
> - if (frontswap_map)
> - memset(frontswap_map, 0, maxpages / sizeof(long));
> + frontswap_map = vzalloc(maxpages / sizeof(long));
> + if (!frontswap_map)
> + goto bad_swap;
vzalloc part looks good but shouldn't we disable frontswap rather than
fail?
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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