mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 06:44:49 +01:00
5247c034a6
Outside of SQPOLL, normally SQ entries are consumed by the time the submission syscall returns. For those cases we don't need a circular buffer and the head/tail tracking, instead the kernel can assume that entries always start from the beginning of the SQ at index 0. This patch introduces a setup flag doing exactly that. It's a simpler and helps to keeps SQEs hot in cache. The feature is optional and enabled by setting IORING_SETUP_SQ_REWIND. The flag is rejected if passed together with SQPOLL as it'd require waiting for SQ before each submission. It also requires IORING_SETUP_NO_SQARRAY, which can be supported but it's unlikely there will be users, so leave more space for future optimisations. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|---|---|---|
| .. | ||
| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| cxl | ||
| drm | ||
| dt-bindings | ||
| hyperv | ||
| keys | ||
| kunit | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| rv | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| ufs | ||
| vdso | ||
| video | ||
| xen | ||
| Kbuild | ||