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From: "Xie, Huawei" <huawei.xie@intel.com>
To: Linhaifeng <haifeng.lin@huawei.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH RFC v2 00/12] lib/librte_vhost: vhost-user support
Date: Mon, 26 Jan 2015 07:24:35 +0000
Message-ID: <C37D651A908B024F974696C65296B57B0F35ECE0@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <54C20361.1090105@huawei.com>

> -----Original Message-----
> From: Linhaifeng [mailto:haifeng.lin@huawei.com]
> Sent: Friday, January 23, 2015 4:17 PM
> To: Xie, Huawei; dev@dpdk.org
> Cc: haifeng.lin@intel.com
> Subject: Re: [dpdk-dev] [PATCH RFC v2 00/12] lib/librte_vhost: vhost-user
> support
> 
> Hi, Xie
> 
> could you test vhost-user with follow numa node xml:
> <memory>2097152</memory>
>   <cpu>
>     <numa>
>       <cell id='0' cpus='0' memory='1048576' memAccess='shared'/>
>       <cell id='0' cpus='0' memory='1048576' memAccess='shared'/>
>     </numa>
>   </cpu>
> 
> 
> I cann't receive data from VM with above xml.
> 

1. 
I guess you want to configure numa memory for guest, and the xml should be:
<cell id='0' cpus='0' memory='1048576' memAccess='shared'/>
<cell id='1' cpus='1' memory='1048576' memAccess='shared'/>
, right?
Otherwise you are specifying the same memdev id, which cause qemu  fail to boot.

2.
>From the following output, qemu uses two hugepage files to map guest memory, \
while we receive two fds "pointing to the same hugepage file".
This should be a qemu bug.
I recall there is bug related to memory mapping with multiple node, right?
We will recommend customers not  to configure multiple memory node in guest until the bug is fixed in qemu.

# ls /proc/`pgrep qemu`/fd -l | grep huge
lrwx------. 1 root root 64 Jan 25 23:09 7 -> /mnt/huge/qemu_back_mem._objects_mem0.UfvViC (deleted)
lrwx------. 1 root root 64 Jan 25 23:09 8 -> /mnt/huge/qemu_back_mem._objects_mem1.kuX5tu (deleted)


# cat /proc/`pgrep qemu`/maps | grep huge
2aaac0000000-2aab00000000 rw-s 00000000 00:20 2674754                    /mnt/huge/qemu_back_mem._objects_mem0.UfvViC (deleted)
2aab00000000-2aab40000000 rw-s 00000000 00:20 2674755                    /mnt/huge/qemu_back_mem._objects_mem1.kuX5tu (deleted)

(gdb) p /x *memory.regions@memory.nregions
$21 = {{guest_phys_addr = 0xc0000, memory_size = 0x7ff40000, userspace_addr = 0x2aaac00c0000,
    mmap_offset = 0xc0000}, {guest_phys_addr = 0x0, memory_size = 0xa0000,
    userspace_addr = 0x2aaac0000000, mmap_offset = 0x0}}


#ls -l /proc/`pgrep vhost`/fd | grep qemu_back
lrwx------. 1 root root 64 Jan 25 23:18 22 -> /mnt/huge/qemu_back_mem._objects_mem0.UfvViC (deleted)
lrwx------. 1 root root 64 Jan 25 23:18 24 -> /mnt/huge/qemu_back_mem._objects_mem0.UfvViC (deleted)

      reply	other threads:[~2015-01-26  7:24 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-10 21:37 Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 01/12] lib/librte_vhost: mov vhost-cuse implementation to vhost_cuse directory Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 02/12] lib/librte_vhost: rename vhost-net-cdev.h as vhost-net.h Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 03/12] lib/librte_vhost: move event_copy logic from virtio-net.c to vhost-net-cdev.c Huawei Xie
2015-01-07  9:10   ` Xie, Huawei
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 04/12] lib/librte_vhost: copy of host_memory_map from virtio-net.c to new file virtio-net-cdev.c Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 05/12] lib/librte_vhost: host_memory_map refine Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 06/12] lib/librte_vhost: cuse_set_memory_table Huawei Xie
2014-12-15  5:20   ` Tetsuya Mukawa
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 07/12] lib/librte_vhost: async event and callback Huawei Xie
2014-12-15  5:20   ` Tetsuya Mukawa
2014-12-17 17:51     ` Xie, Huawei
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 08/12] lib/librte_vhost: vhost-user support Huawei Xie
2014-12-11  5:36   ` Linhaifeng
2015-01-05 10:21     ` Xie, Huawei
2015-01-23  3:40     ` Xie, Huawei
2015-01-23  3:53       ` Linhaifeng
2014-12-11  6:04   ` Linhaifeng
2014-12-11 17:13     ` Xie, Huawei
2014-12-12  2:25       ` Linhaifeng
2014-12-11 20:16     ` Xie, Huawei
2015-01-23  3:36     ` Xie, Huawei
2015-01-23  8:36       ` Linhaifeng
2014-12-16  3:05   ` Tetsuya Mukawa
2014-12-17  1:06     ` Xie, Huawei
2014-12-17  3:31       ` Tetsuya Mukawa
2014-12-17  4:22         ` Tetsuya Mukawa
2014-12-17 17:31           ` Xie, Huawei
2014-12-19  3:36             ` Tetsuya Mukawa
2014-12-24  7:21   ` Tetsuya Mukawa
2015-01-04  9:53     ` Xie, Huawei
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 09/12] lib/librte_vhost: minor fix Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 10/12] lib/librte_vhost: vhost-user memory region map Huawei Xie
2014-12-16  2:38   ` Tetsuya Mukawa
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 11/12] lib/librte_vhost: kick/callfd fix Huawei Xie
2014-12-10 21:37 ` [dpdk-dev] [PATCH RFC v2 12/12] lib/librte_vhost: cleanup when vhost user socket connection is closed Huawei Xie
2014-12-10 22:04 ` [dpdk-dev] [PATCH RFC v2 00/12] lib/librte_vhost: vhost-user support Xie, Huawei
2014-12-11  2:21   ` Tetsuya Mukawa
2014-12-15  5:26 ` Tetsuya Mukawa
2014-12-17 17:43   ` Xie, Huawei
2015-01-07 12:43     ` Qiu, Michael
2015-01-23  8:16 ` Linhaifeng
2015-01-26  7:24   ` Xie, Huawei [this message]

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