Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-10 07:10:27 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

io_uring: move req->poll_refs into previous struct hole

Browse Source 
This serves two purposes:

- We now have the last cacheline mostly unused for generic workloads,
  instead of having to pull in the poll refs explicitly for workloads
  that rely on poll arming.

- It shrinks the io_kiocb from 232 to 224 bytes.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2022-03-16 12:53:23 -06:00
parent 052ebf1fbb
commit 521d61fc76
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/io_uring.c
View File

@ -908,6 +908,7 @@ struct io_kiocb {
/* used by request caches, completion batching and iopoll */
struct io_wq_work_node comp_list;
atomic_t refs;
atomic_t poll_refs;
struct io_kiocb *link;
struct io_task_work io_task_work;
/* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */
@ -916,12 +917,11 @@ struct io_kiocb {
struct async_poll *apoll;
/* opcode allocated if it needs to store data for async defer */
void *async_data;
struct io_wq_work work;
/* custom credentials, valid IFF REQ_F_CREDS is set */
const struct cred *creds;
/* stores selected buf, valid IFF REQ_F_BUFFER_SELECTED is set */
struct io_buffer *kbuf;
atomic_t poll_refs;
const struct cred *creds;
struct io_wq_work work;
};
struct io_tctx_node {