| Message ID | a68ff48da5a52be8f64b058c30d7076fbec41beb.1660124059.git.asml.silence@gmail.com (mailing list archive) |
|---|---|
| State | RFC |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | improve io_uring's ubuf_info refcounting | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/subject_prefix | success | Link |
| netdev/cover_letter | success | Series has a cover letter |
| netdev/patch_count | success | Link |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 3 this patch: 3 |
| netdev/cc_maintainers | success | CCed 3 of 3 maintainers |
| netdev/build_clang | success | Errors and warnings before: 5 this patch: 5 |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/check_selftest | success | No net selftest shell script |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 3 this patch: 3 |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 36 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | fail | Was 0 now: 1 |
diff --git a/io_uring/notif.c b/io_uring/notif.c index a2ba1e35a59f..5661681b3b44 100644 --- a/io_uring/notif.c +++ b/io_uring/notif.c @@ -73,6 +73,13 @@ struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx, return notif; } +static inline bool io_notif_drop_refs(struct io_notif_data *nd) +{ + int refs = 1; + + return refcount_sub_and_test(refs, &nd->uarg.refcnt); +} + void io_notif_slot_flush(struct io_notif_slot *slot) __must_hold(&ctx->uring_lock) { @@ -81,8 +88,7 @@ void io_notif_slot_flush(struct io_notif_slot *slot) slot->notif = NULL; - /* drop slot's master ref */ - if (refcount_dec_and_test(&nd->uarg.refcnt)) + if (io_notif_drop_refs(nd)) io_notif_complete(notif); } @@ -97,13 +103,11 @@ __cold int io_notif_unregister(struct io_ring_ctx *ctx) for (i = 0; i < ctx->nr_notif_slots; i++) { struct io_notif_slot *slot = &ctx->notif_slots[i]; struct io_kiocb *notif = slot->notif; - struct io_notif_data *nd; if (!notif) continue; - nd = io_kiocb_to_cmd(notif); slot->notif = NULL; - if (!refcount_dec_and_test(&nd->uarg.refcnt)) + if (!io_notif_drop_refs(io_kiocb_to_cmd(notif))) continue; notif->io_task_work.func = __io_notif_complete_tw; io_req_task_work_add(notif);
Add a helper for dropping notification references during flush. It's a preparation patch, currently it's only one master ref, but we're going to add ref caching. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> --- io_uring/notif.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)