[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] memory leak in block/xen_disk in qemu-3.x
From: |
Olaf Hering |
Subject: |
[Qemu-devel] memory leak in block/xen_disk in qemu-3.x |
Date: |
Tue, 11 Dec 2018 16:30:47 +0100 |
User-agent: |
Mutt/1.11.1 (20181204T200311.382355a5) |
What are the live time rules of ioreq->buf?
In my testing the memory usage of qemu is constantly growing from about
250MB to several GB after a few days.
Some debugging shows that ioreq_runio_qemu_aio() overwrites ioreq->buf,
which contributes to the leak. In addition, ioreq_reset() also just
globbers iorew->buf. While this was observed with a backport of xen_disk
changes to qemu-2.9, the code in xen_disk.c did not change in this
regard. I changed the code to call qemu_vfree(ioreq->buf) in the few
places that globber the pointer, that fixes the leak for me.
Right now neither qemu-3.0 nor 3.1 for me, so I can not test
qemu.git#master if it eventually behaves different than
qemu.git#stable-2.9+backport.
Olaf
signature.asc
Description: PGP signature
- [Qemu-devel] memory leak in block/xen_disk in qemu-3.x,
Olaf Hering <=