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authorMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>2017-10-04 01:20:11 +0300
committerDavid S. Miller <davem@davemloft.net>2017-10-04 02:27:28 +0300
commitf952be79cebd49d04154781d99408867a069d375 (patch)
treece68d2060940a95d6a8657bc44d261d856668bd5 /net/sctp/stream.c
parent1fdb8d8fefe2e7320ea15a65051758a4c4332f05 (diff)
downloadlinux-f952be79cebd49d04154781d99408867a069d375.tar.xz
sctp: introduce struct sctp_stream_out_ext
With the stream schedulers, sctp_stream_out will become too big to be allocated by kmalloc and as we need to allocate with BH disabled, we cannot use __vmalloc in sctp_stream_init(). This patch moves out the stats from sctp_stream_out to sctp_stream_out_ext, which will be allocated only when the application tries to sendmsg something on it. Just the introduction of sctp_stream_out_ext would already fix the issue described above by splitting the allocation in two. Moving the stats to it also reduces the pressure on the allocator as we will ask for less memory atomically when creating the socket and we will use GFP_KERNEL later. Then, for stream schedulers, we will just use sctp_stream_out_ext. Tested-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/stream.c')
-rw-r--r--net/sctp/stream.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index 952437d656cc..055ca25bbc91 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -121,8 +121,24 @@ in:
return 0;
}
+int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid)
+{
+ struct sctp_stream_out_ext *soute;
+
+ soute = kzalloc(sizeof(*soute), GFP_KERNEL);
+ if (!soute)
+ return -ENOMEM;
+ stream->out[sid].ext = soute;
+
+ return 0;
+}
+
void sctp_stream_free(struct sctp_stream *stream)
{
+ int i;
+
+ for (i = 0; i < stream->outcnt; i++)
+ kfree(stream->out[i].ext);
kfree(stream->out);
kfree(stream->in);
}