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io_uring: report pinned memory usage

Browse source 
Report pinned memory usage always, regardless of whether locked memory
limit is enforced.

Signed-off-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bijan Mottahedeh 2020-06-16 16:36:09 -07:00 committed by Jens Axboe
parent aad5d8da1b
commit 309758254e
1 changed files with 18 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
fs/io_uring.c
View file

@ -6997,12 +6997,23 @@ static void io_unaccount_mem(struct io_ring_ctx *ctx, unsigned long nr_pages)
{
if (ctx->limit_mem)
__io_unaccount_mem(ctx->user, nr_pages);
if (ctx->sqo_mm)
atomic64_sub(nr_pages, &ctx->sqo_mm->pinned_vm);
}
static int io_account_mem(struct io_ring_ctx *ctx, unsigned long nr_pages)
{
if (ctx->limit_mem)
return __io_account_mem(ctx->user, nr_pages);
int ret;
if (ctx->limit_mem) {
ret = __io_account_mem(ctx->user, nr_pages);
if (ret)
return ret;
}
if (ctx->sqo_mm)
atomic64_add(nr_pages, &ctx->sqo_mm->pinned_vm);
return 0;
}
@ -7304,8 +7315,10 @@ static void io_destroy_buffers(struct io_ring_ctx *ctx)
static void io_ring_ctx_free(struct io_ring_ctx *ctx)
{
io_finish_async(ctx);
if (ctx->sqo_mm)
if (ctx->sqo_mm) {
mmdrop(ctx->sqo_mm);
ctx->sqo_mm = NULL;
}
io_iopoll_reap_events(ctx);
io_sqe_buffer_unregister(ctx);
@ -7912,7 +7925,6 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p,
return -ENOMEM;
}
ctx->compat = in_compat_syscall();
ctx->limit_mem = limit_mem;
ctx->user = user;
ctx->creds = get_current_cred();
@ -7960,6 +7972,8 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p,
goto err;
trace_io_uring_create(ret, ctx, p->sq_entries, p->cq_entries, p->flags);
io_account_mem(ctx, ring_pages(p->sq_entries, p->cq_entries));
ctx->limit_mem = limit_mem;
return ret;
err:
io_ring_ctx_wait_and_kill(ctx);