[PATCH net-next v4 20/27] io_uring: account locked pages for non-fixed zc
From: Pavel Begunkov <asml.silence@gmail.com>
Date: 2022-07-07 11:53:19
Also in:
io-uring, lkml
Subsystem:
io_uring, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Fixed buffers are RLIMIT_MEMLOCK accounted, however it doesn't cover iovec based zerocopy sends. Do the accounting on the io_uring side. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> --- io_uring/net.c | 1 + io_uring/notif.c | 6 ++++++ 2 files changed, 7 insertions(+)
diff --git a/io_uring/net.c b/io_uring/net.c
index 399267e8f1ef..69273d4f4ef0 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c@@ -724,6 +724,7 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags) ret = import_single_range(WRITE, zc->buf, zc->len, &iov, &msg.msg_iter); if (unlikely(ret)) return ret; + mm_account_pinned_pages(¬if->uarg.mmp, zc->len); msg_flags = zc->msg_flags | MSG_ZEROCOPY; if (issue_flags & IO_URING_F_NONBLOCK)
diff --git a/io_uring/notif.c b/io_uring/notif.c
index e6d98dc208c7..c5179e5c1cd6 100644
--- a/io_uring/notif.c
+++ b/io_uring/notif.c@@ -14,7 +14,13 @@ static void __io_notif_complete_tw(struct callback_head *cb) struct io_notif *notif = container_of(cb, struct io_notif, task_work); struct io_rsrc_node *rsrc_node = notif->rsrc_node; struct io_ring_ctx *ctx = notif->ctx; + struct mmpin *mmp = ¬if->uarg.mmp; + if (mmp->user) { + atomic_long_sub(mmp->num_pg, &mmp->user->locked_vm); + free_uid(mmp->user); + mmp->user = NULL; + } if (likely(notif->task)) { io_put_task(notif->task, 1); notif->task = NULL;
--
2.36.1