[Barrelfish-users] How to use fopen on a span-ed dispatcher on Barrelfish
zchothia at student.ethz.ch
Thu Apr 25 12:42:19 CEST 2013
I can reproduce the issue you describe although I don't understand the
underlying problem. Adding the list in case someone else can comment.
The step which fails is opening a file on the remote core. Full error message:
ERROR: autorun1.1 in resolve_path() ../lib/vfs/vfs_ramfs.c:81
ERROR: transport error in lookup
Failure: ( kernel) Capability not found (empty slot encountered) [SYS_ERR_CAP_NOT_FOUND]
I also tried opening on the main thread, then reading from the remote core
which also fails:
ERROR: autorun1.1 in read_bulk() ../lib/vfs/vfs_ramfs.c:342
ERROR: transport error in read
nRRFaORi:l uraeut:o r( u n 1. 1 i n vkfersnfed_lr) eSald(o)t s.p./elciifbi/evfds f/ovrfs _LfRPdC. c:d1oe0s0
oEt RcROoRn:ta ienrr oanr einn dvpofisn_rte caadp
Failure: ( kernel) Slot specified for LRPC does not contain an endpoint cap [SYS_ERR_LRPC_NOT_ENDPOINT]
As a workaround you may be able to register a stub which shuttles requests to
and back from core 0 for processing (using newlib_register_fsops__).
From: 郭明宇 [mailto:369389319 at qq.com]
Sent: 25 April 2013 07:11
To: Chothia Zaheer
Subject: How to use fopen on a span-ed dispatcher on Barrelfish
May I ask you question about fs on Barrelfish?
I know how to read or write a file on Barrelfish. I can use:
But, when I read a file in a spaned dispatcher. I got some pagefault error. I did this:
It says that "transport error in lookup" in lib/vfs/vfs_ramfs.c:81
I thought that I may should use vfs_init in the new dispatcher. But after I did that, it told me that vfs_init should not be called twice.
Can you please tell me, how to read a file on a span-ed dispatcher on Barrelfish?
Really really thanks,
More information about the Barrelfish-users