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[Qemu-devel] [PATCH 0/4] linux-aio: rewrite and simplify queuing code
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 0/4] linux-aio: rewrite and simplify queuing code |
Date: |
Wed, 10 Dec 2014 15:51:58 +0100 |
This series rewrites the io_submit code to avoid having to
synchronize the iocbs in two places (qemu_laiocb and LaioQueue).
Instead, the queue of pending I/O requests is kept in a list.
This fixes the problems with io_submit doing partial submissions
or failing with EAGAIN, without complicating the code. The bug is
shown by "qemu-img bench -n -t none -s 65536 -d 1024 -c 100000"
pretty much instantly.
Paolo
Paolo Bonzini (4):
linux-aio: queue requests that cannot be submitted
linux-aio: track whether the queue is blocked
linux-aio: rename LaioQueue idx field to "n"
linux-aio: simplify removal of completed iocbs from the list
block/linux-aio.c | 86 +++++++++++++++++++++++++---------------------------
include/qemu/queue.h | 11 +++++++
2 files changed, 53 insertions(+), 44 deletions(-)
--
2.1.0
- [Qemu-devel] [PATCH 0/4] linux-aio: rewrite and simplify queuing code,
Paolo Bonzini <=
[Qemu-devel] [PATCH 2/4] linux-aio: track whether the queue is blocked, Paolo Bonzini, 2014/12/10
[Qemu-devel] [PATCH 4/4] linux-aio: simplify removal of completed iocbs from the list, Paolo Bonzini, 2014/12/10