Re: [Linux-cachefs] vanilla-sources CacheFS & UnionFS

[Srinivasa Ds <srinivasa@xxxxxxxxxx>]

Andreas Bandner wrote:
> hi,
>
> I'm working on a Gentoo diskless system
> CacheFS & UninonFS should be used to spread the system to the clients
>
> CacheFS works fine under Gentoo with the mm-sources.
>
> When trying to patch vanilla-sources (2.6.19-rc6) with
> http://people.redhat.com/~dhowells/fscache/patches/nfs+fscache-19.tar.bz2
> then compilation is fine, but i can't bind the cache.
>
> Error is Unable to open /proc/fs/cachefiles: errno 2 (No such file or
> directory)
>   
Are sure that sure that, CONFIG_FSCACHE is enabled in your config file?

Thanks
Srinivasa DS
> some ideas ?
> strace follows
>
> Is someone working on the same ?
> I just created a GentooWiki for CacheFS
> http://gentoo-wiki.com/HOWTO_CacheFS
>
> thanks
>
> Andy
>
> strace cachefilesd -s
> execve("/sbin/cachefilesd", ["cachefilesd", "-s"], [/* 45 vars */]) = 0
> brk(0)                                  = 0x8056000
> access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or
> directory)
> open("/etc/ld.so.cache", O_RDONLY)      = 3
> fstat64(3, {st_mode=S_IFREG|0644, st_size=73935, ...}) = 0
> mmap2(NULL, 73935, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f2e000
> close(3)                                = 0
> open("/lib/libc.so.6", O_RDONLY)        = 3
> read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300Y\1"..., 512) =
> 512
> fstat64(3, {st_mode=S_IFREG|0755, st_size=1197180, ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> 0xb7f2d000
> mmap2(NULL, 1168764, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
> 0xb7e0f000
> mmap2(0xb7f26000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
> MAP_DENYWRITE, 3, 0x116) = 0xb7f26000
> mmap2(0xb7f2a000, 9596, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
> MAP_ANONYMOUS, -1, 0) = 0xb7f2a000
> close(3)                                = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> 0xb7e0e000
> set_thread_area({entry_number:-1 -> 6, base_addr:0xb7e0e6b0, limit:1048575,
> seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1,
> seg_not_present:0, useable:1}) = 0
> mprotect(0xb7f26000, 8192, PROT_READ)   = 0
> mprotect(0xb7f5c000, 4096, PROT_READ)   = 0
> munmap(0xb7f2e000, 73935)               = 0
> getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
> setresuid32(0, 0, 0)                    = 0
> setresgid32(0, 0, 0)                    = 0
> sync()                                  = 0
> open("/proc/fs/cachefiles", O_RDWR)     = -1 ENOENT (No such file or
> directory)
> write(2, "Unable to open /proc/fs/cachefil"..., 72Unable to
> open /proc/fs/cachefiles: errno 2 (No such file or directory)
> ) = 72
> exit_group(1)                           = ?
> Process 4284 detached
>
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