Re: [PATCH 18/24] sctp: Remove unnecessary OOM logging messages

Eric Dumazet
2011-08-29T21:43:35Z

Le lundi 29 août 2011 à 14:17 -0700, Joe Perches a écrit :
> Removing unnecessary messages saves code and text.
>
> Site specific OOM messages are duplications of a generic MM
> out of memory message and aren't really useful, so just
> delete them.
>
> Signed-off-by: Joe Perches <joe@perches.com>
> ---
> net/sctp/protocol.c | 3 ---
> 1 files changed, 0 insertions(+), 3 deletions(-)
>
> diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
> index 91784f4..0801444 100644
> --- a/net/sctp/protocol.c
> +++ b/net/sctp/protocol.c
> @@ -1326,7 +1326,6 @@ SCTP_STATIC __init int sctp_init(void)
> __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order);
> } while (!sctp_assoc_hashtable && --order > 0);
> if (!sctp_assoc_hashtable) {
> - pr_err("Failed association hash alloc\n");
> status = -ENOMEM;
> goto err_ahash_alloc;
> }
> @@ -1340,7 +1339,6 @@ SCTP_STATIC __init int sctp_init(void)
> sctp_ep_hashtable = (struct sctp_hashbucket *)
> kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
> if (!sctp_ep_hashtable) {
> - pr_err("Failed endpoint_hash alloc\n");
> status = -ENOMEM;
> goto err_ehash_alloc;
> }
> @@ -1359,7 +1357,6 @@ SCTP_STATIC __init int sctp_init(void)
> __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order);
> } while (!sctp_port_hashtable && --order > 0);
> if (!sctp_port_hashtable) {
> - pr_err("Failed bind hash alloc\n");
> status = -ENOMEM;
> goto err_bhash_alloc;
> }

It would be nice if you could avoid all these patches, that you dont
even read.

As I already told you in the past, __GFP_NOWARN dont print generic OOM
messages.

Its not because I told Wang Shaoyan not adding a useless "pr_err("Out of
memory\n");" in last gianfar patch, that you have to remove all
messages, with one hundred or more patches.

If I remember well, you even disagreed at that time.

Furthermore, a failed vmalloc() is not guaranteed to emit an OOM
message, is it ?