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authorPavel Begunkov <asml.silence@gmail.com>2022-07-25 12:52:05 +0300
committerJens Axboe <axboe@kernel.dk>2022-07-25 18:48:25 +0300
commit6a9ce66f4d0872861e0bbc67eee6ce5dca5dd886 (patch)
tree81e66222f137d24bf38d367a9d29d4e91c6dd6c5 /io_uring
parent2e32ba5607ee2b668baa8831dd74f7cc867a1f7e (diff)
downloadlinux-6a9ce66f4d0872861e0bbc67eee6ce5dca5dd886.tar.xz
io_uring/net: make page accounting more consistent
Make network page accounting more consistent with how buffer registration is working, i.e. account all memory to ctx->user. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/4aacfe64bbb81b27f9ecf5d5c219c69a07e5aa56.1658742118.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
-rw-r--r--io_uring/net.c2
-rw-r--r--io_uring/notif.c9
-rw-r--r--io_uring/notif.h19
-rw-r--r--io_uring/rsrc.c12
-rw-r--r--io_uring/rsrc.h9
5 files changed, 37 insertions, 14 deletions
diff --git a/io_uring/net.c b/io_uring/net.c
index 8fb8469c3315..c13d971c7826 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -985,7 +985,7 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
&msg.msg_iter);
if (unlikely(ret))
return ret;
- ret = mm_account_pinned_pages(&notif->uarg.mmp, zc->len);
+ ret = io_notif_account_mem(notif, zc->len);
if (unlikely(ret))
return ret;
}
diff --git a/io_uring/notif.c b/io_uring/notif.c
index a93887451bbb..e986a0ed958c 100644
--- a/io_uring/notif.c
+++ b/io_uring/notif.c
@@ -14,12 +14,10 @@ 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 = &notif->uarg.mmp;
- if (mmp->user) {
- atomic_long_sub(mmp->num_pg, &mmp->user->locked_vm);
- free_uid(mmp->user);
- mmp->user = NULL;
+ if (notif->account_pages && ctx->user) {
+ __io_unaccount_mem(ctx->user, notif->account_pages);
+ notif->account_pages = 0;
}
if (likely(notif->task)) {
io_put_task(notif->task, 1);
@@ -121,6 +119,7 @@ struct io_notif *io_alloc_notif(struct io_ring_ctx *ctx,
notif->ctx = ctx;
notif->uarg.flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN;
notif->uarg.callback = io_uring_tx_zerocopy_callback;
+ notif->account_pages = 0;
}
notif->seq = slot->seq++;
diff --git a/io_uring/notif.h b/io_uring/notif.h
index 3e05d2cecb6f..d6f366b1518b 100644
--- a/io_uring/notif.h
+++ b/io_uring/notif.h
@@ -5,6 +5,8 @@
#include <net/sock.h>
#include <linux/nospec.h>
+#include "rsrc.h"
+
#define IO_NOTIF_SPLICE_BATCH 32
#define IORING_MAX_NOTIF_SLOTS (1U << 10)
@@ -23,6 +25,8 @@ struct io_notif {
/* hook into ctx->notif_list and ctx->notif_list_locked */
struct list_head cache_node;
+ unsigned long account_pages;
+
union {
struct callback_head task_work;
struct work_struct commit_work;
@@ -85,3 +89,18 @@ static inline void io_notif_slot_flush_submit(struct io_notif_slot *slot,
}
io_notif_slot_flush(slot);
}
+
+static inline int io_notif_account_mem(struct io_notif *notif, unsigned len)
+{
+ struct io_ring_ctx *ctx = notif->ctx;
+ unsigned nr_pages = (len >> PAGE_SHIFT) + 2;
+ int ret;
+
+ if (ctx->user) {
+ ret = __io_account_mem(ctx->user, nr_pages);
+ if (ret)
+ return ret;
+ notif->account_pages += nr_pages;
+ }
+ return 0;
+}
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 9165fdf64269..59704b9ac537 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -44,17 +44,13 @@ void io_rsrc_refs_drop(struct io_ring_ctx *ctx)
}
}
-static inline void __io_unaccount_mem(struct user_struct *user,
- unsigned long nr_pages)
-{
- atomic_long_sub(nr_pages, &user->locked_vm);
-}
-
-static inline int __io_account_mem(struct user_struct *user,
- unsigned long nr_pages)
+int __io_account_mem(struct user_struct *user, unsigned long nr_pages)
{
unsigned long page_limit, cur_pages, new_pages;
+ if (!nr_pages)
+ return 0;
+
/* Don't allow more pages than we can safely lock */
page_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h
index 21813a23215f..f3a9a177941f 100644
--- a/io_uring/rsrc.h
+++ b/io_uring/rsrc.h
@@ -169,4 +169,13 @@ static inline u64 *io_get_tag_slot(struct io_rsrc_data *data, unsigned int idx)
int io_rsrc_update(struct io_kiocb *req, unsigned int issue_flags);
int io_rsrc_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+
+int __io_account_mem(struct user_struct *user, unsigned long nr_pages);
+
+static inline void __io_unaccount_mem(struct user_struct *user,
+ unsigned long nr_pages)
+{
+ atomic_long_sub(nr_pages, &user->locked_vm);
+}
+
#endif