From: Bijan Mottahedeh <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: [RFC 2/2] io_uring: report pinned memory usage
Date: Thu, 11 Jun 2020 19:23:37 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
Long term, it makes sense to separate reporting and enforcing of pinned
memory usage.
Signed-off-by: Bijan Mottahedeh <[email protected]>
It is useful to view
---
fs/io_uring.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 4248726..cf3acaa 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7080,6 +7080,8 @@ static int io_sq_offload_start(struct io_ring_ctx *ctx,
static void io_unaccount_mem(struct user_struct *user, unsigned long nr_pages)
{
atomic_long_sub(nr_pages, &user->locked_vm);
+ if (current->mm)
+ atomic_long_sub(nr_pages, ¤t->mm->pinned_vm);
}
static int io_account_mem(struct user_struct *user, unsigned long nr_pages)
@@ -7096,6 +7098,8 @@ static int io_account_mem(struct user_struct *user, unsigned long nr_pages)
return -ENOMEM;
} while (atomic_long_cmpxchg(&user->locked_vm, cur_pages,
new_pages) != cur_pages);
+ if (current->mm)
+ atomic_long_add(nr_pages, ¤t->mm->pinned_vm);
return 0;
}
--
1.8.3.1
next prev parent reply other threads:[~2020-06-12 2:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-12 2:23 [RFC 0/2] io_uring: disallow overlapping ranges for buffer registration Bijan Mottahedeh
2020-06-12 2:23 ` [RFC 1/2] " Bijan Mottahedeh
2020-06-12 15:16 ` Jens Axboe
2020-06-12 18:22 ` Bijan Mottahedeh
2020-06-14 15:56 ` Jens Axboe
2020-06-12 2:23 ` Bijan Mottahedeh [this message]
2020-06-12 15:16 ` [RFC 2/2] io_uring: report pinned memory usage Jens Axboe
2020-06-12 15:19 ` Jens Axboe
2020-06-12 15:50 ` Jens Axboe
2020-06-13 4:43 ` Bijan Mottahedeh
2020-06-14 15:57 ` Jens Axboe
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