From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- io_uring/loop.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 io_uring/loop.h (limited to 'io_uring/loop.h') diff --git a/io_uring/loop.h b/io_uring/loop.h new file mode 100644 index 000000000..4dd4fb3ae --- /dev/null +++ b/io_uring/loop.h @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +#ifndef IOU_LOOP_H +#define IOU_LOOP_H + +#include + +struct iou_loop_params { + /* + * The CQE index to wait for. Only serves as a hint and can still be + * woken up earlier. + */ + __u32 cq_wait_idx; +}; + +enum { + IOU_LOOP_CONTINUE = 0, + IOU_LOOP_STOP, +}; + +static inline bool io_has_loop_ops(struct io_ring_ctx *ctx) +{ + return data_race(ctx->loop_step); +} + +int io_run_loop(struct io_ring_ctx *ctx); + +static inline struct iou_ctx *io_loop_mangle_ctx(struct io_ring_ctx *ctx) +{ + return (struct iou_ctx *)ctx; +} + +static inline struct io_ring_ctx *io_loop_demangle_ctx(struct iou_ctx *ctx) +{ + return (struct io_ring_ctx *)ctx; +} + +#endif -- cgit v1.3.1