Please change the clib_unix_warning to print p->stack and page_size.
If they look sane—which is likely—you’ll need to figure out why the kernel is
complaining. I wouldn’t be shocked to discover that the 64k page size kernel
simply refuses to read-protect one 64k page in the middle of a much larger
chunk of read/write memory.
Worst-case you can simply disable the mprotect call which creates
stack-overflow guard pages. You won’t detect stack overflows as easily, but vpp
will run fine without the guard pages so long as no stack overflows occur.
D.
From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Lei Zhang
Sent: Friday, November 22, 2019 1:05 AM
To: vpp-dev@lists.fd.io
Subject: [vpp-dev] Support needed for ARM64 64k pagesize
Hi,
Anyone knows if VPP can support ARM64 64K pagesize?
Or anyone has experiences on below issue?
Thank you!
Here is the kernel config.
# CONFIG_ARM64_4K_PAGES is not set
# CONFIG_ARM64_16K_PAGES is not set
CONFIG_ARM64_64K_PAGES=y
VPP reports a lot of errors when it starts up on ARM64 64k pagesize
enviroment.
load_one_plugin:189: Loaded plugin: stn_plugin.so (VPP Steals the NIC for
Container integration)
load_one_plugin:189: Loaded plugin: svs_plugin.so (Source VRF Select)
load_one_plugin:189: Loaded plugin: tlsopenssl_plugin.so (openssl based TLS
Engine)
load_one_plugin:117: Plugin disabled (default): unittest_plugin.so
load_one_plugin:189: Loaded plugin: vmxnet3_plugin.so (VMWare Vmxnet3 Device
Plugin)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
register_node:476: process stack: Invalid argument (errno 22)
The source code of the error is at mprotect(). It seems that VPP memeory
management may not support 64K pagesize.
#ifdef CLIB_UNIX
/*
* Disallow writes to the bottom page of the stack, to
* catch stack overflows.
*/
if (mprotect (p->stack, page_size, PROT_READ) < 0)
clib_unix_warning ("process stack");
#endif
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