Ah it's not really a NFS problem..
On Sun, May 03, 2009 at 06:54:56PM +0800, Wu Fengguang wrote:
>
> My NFSROOT box sometimes will get stuck for a dozen seconds during boot.
>
[snip]
> The NFSROOT client that got stuck is running latest linux-next, the
> server side is running 2.6.30-rc3.
>
> Switching the client kernel to latest -mm makes it very reproducible.
> Here is another stack dump:
>
> [ 180.399845] udevd D ffff8800280291e0 3056 1388 1
The udevd is doing this busy loop like mad:
open("/etc/group", O_RDONLY|O_CLOEXEC) = 7
lseek(7, 0, SEEK_CUR) = 0
fstat(7, {st_mode=S_IFREG|0644, st_size=797, ...}) = 0
mmap(NULL, 797, PROT_READ, MAP_SHARED, 7, 0) = 0x7f6791601000
lseek(7, 797, SEEK_SET) = 797
munmap(0x7f6791601000, 797) = 0
close(7) = 0
udev version is 0.141-1.
Thanks,
Fengguang
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