Re: [libvirt] [PATCH] init: raise default system aio limits

2011-10-05 Thread Eric Blake
On 10/04/2011 12:41 PM, Laine Stump wrote: On 10/04/2011 12:59 PM, Eric Blake wrote: https://bugzilla.redhat.com/show_bug.cgi?id=740899 documents that if qemu uses aio=native for its disks, then it consumes 128 aio requests per disk. On a host with multiple guests, this can quickly run out of

[libvirt] [PATCH] init: raise default system aio limits

2011-10-04 Thread Eric Blake
https://bugzilla.redhat.com/show_bug.cgi?id=740899 documents that if qemu uses aio=native for its disks, then it consumes 128 aio requests per disk. On a host with multiple guests, this can quickly run out of kernel aio requests with the default aio-max-nr of 65536. Kernel developers have

Re: [libvirt] [PATCH] init: raise default system aio limits

2011-10-04 Thread Laine Stump
On 10/04/2011 12:59 PM, Eric Blake wrote: https://bugzilla.redhat.com/show_bug.cgi?id=740899 documents that if qemu uses aio=native for its disks, then it consumes 128 aio requests per disk. On a host with multiple guests, this can quickly run out of kernel aio requests with the default