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authorPavel Begunkov <asml.silence@gmail.com>2020-06-08 21:08:20 +0300
committerJens Axboe <axboe@kernel.dk>2020-06-08 22:47:37 +0300
commitf5fa38c59cb0b40633dee5cdf7465801be3e4928 (patch)
treef654e1a37dcf8464493d76236f965aefe45c8a83 /fs/io-wq.c
parentd4c81f38522f3e7f4be1b472ef9988d0ed7f3696 (diff)
downloadlinux-f5fa38c59cb0b40633dee5cdf7465801be3e4928.tar.xz
io_wq: add per-wq work handler instead of per work
io_uring is the only user of io-wq, and now it uses only io-wq callback for all its requests, namely io_wq_submit_work(). Instead of storing work->runner callback in each instance of io_wq_work, keep it in io-wq itself. pros: - reduces io_wq_work size - more robust -- ->func won't be invalidated with mem{cpy,set}(req) - helps other work Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.c')
-rw-r--r--fs/io-wq.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c
index 4023c9846860..d7dc638f4b8e 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -112,6 +112,7 @@ struct io_wq {
unsigned long state;
free_work_fn *free_work;
+ io_wq_work_fn *do_work;
struct task_struct *manager;
struct user_struct *user;
@@ -528,7 +529,7 @@ get_next:
hash = io_get_work_hash(work);
linked = old_work = work;
- linked->func(&linked);
+ wq->do_work(&linked);
linked = (old_work == linked) ? NULL : linked;
work = next_hashed;
@@ -785,7 +786,7 @@ static void io_run_cancel(struct io_wq_work *work, struct io_wqe *wqe)
struct io_wq_work *old_work = work;
work->flags |= IO_WQ_WORK_CANCEL;
- work->func(&work);
+ wq->do_work(&work);
work = (work == old_work) ? NULL : work;
wq->free_work(old_work);
} while (work);
@@ -1023,7 +1024,7 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
int ret = -ENOMEM, node;
struct io_wq *wq;
- if (WARN_ON_ONCE(!data->free_work))
+ if (WARN_ON_ONCE(!data->free_work || !data->do_work))
return ERR_PTR(-EINVAL);
wq = kzalloc(sizeof(*wq), GFP_KERNEL);
@@ -1037,6 +1038,7 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
}
wq->free_work = data->free_work;
+ wq->do_work = data->do_work;
/* caller must already hold a reference to this */
wq->user = data->user;
@@ -1093,7 +1095,7 @@ err:
bool io_wq_get(struct io_wq *wq, struct io_wq_data *data)
{
- if (data->free_work != wq->free_work)
+ if (data->free_work != wq->free_work || data->do_work != wq->do_work)
return false;
return refcount_inc_not_zero(&wq->use_refs);