[reiserfs-list] Re: [OpenAFS-devel] more on the 2.2.18pre17 SMPcpu hog/etc.

[Danilov Nikita]

-----BEGIN PGP SIGNED MESSAGE-----

Hi,

Hans Reiser writes:
 > Nikita has code not in our main branch that allows looking up files by their keys, we did it for
 > squid when writing a namefree file store for it, let's give him a chance to comment on Monday.

if you are still interested in it, that is what was done for the
lookup-by-key stuff:

(*) there is ioctl to get key of open file descriptor
(*) there is special ram-only fs (like /proc) to open files on given
reiserfs mount by the keys.

 > 
 > Hans
 > 
 > Chris Mason wrote:
 > > 
 > > On Saturday, December 02, 2000 15:33:58 -0500 Derek Atkins
 > > <warlord@MIT.EDU> wrote:
 > > 
 > > > I don't know anything about reiserfs, but I can explain what AFS is
 > > > doing.  Basically, the afsd user-space process does an opendir() on
 > > > the cache directory.  Then it iterates through the files looking for
 > > > the cache files (they are all numbered, and the cachefile number is
 > > > stored in the filename).  For each cache file, it stores the inode
 > > > number (obtained from dirp->d_ino from readdir()) associated that that
 > > > cache file number (obtained from dirp->d_name).

So, call ioctl in stat's stead and remember key.

 > > >

[...]

 > > 
 > > -chris

Nikita.
- -- 
Mail me: NikitaDanilov@Yahoo.COM   Web me: http://nikita.w3.to
PGP: B4DBBD61 4B B8 7B 9D E8 66 04 69  CB BC 76 8F AB 8A 57 02
Of the first was he to bare arms and a name: 
Wassaily Booslaeugh of Riesengeborg. // J.Joyce, Finnegans Wake

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: Hello, Echelon!

iQCVAwUBOiuV5wuKNXy0271hAQHT3wQA5BcGZlUSC/FOq7ftJeroIkViE/Eq9qnk
UCov3OtO1m0OKnqlqjVHjRm4n3QfLdTxdPhN7Ro3jb+BW0yX+/dcr172IjBB1HFE
379wAINDtB6NR8E81EFRA/IcUOzX0Ds15N4RJZ4LF4FUDGyGBR4I5LPKE9YyPgQE
3GVNJ4ZSDzs=
=NK47
-----END PGP SIGNATURE-----