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Re: [dm-devel] 2.6.9-rc2-udm2


got the following w/ 2.6.9rc2 w/o 00026.patch (kdbg) :

LD [M]  drivers/md/dm-multipath.o
drivers/md/dm-roundrobin.o(.init.text+0x0): In function `init_module':
: multiple definition of `init_module'
drivers/md/dm-mpath.o(.init.text+0x0): first defined here
ld: Warning: size of symbol `init_module' changed from 143 in
drivers/md/dm-mpath.o to 53 in drivers/md/dm-roundrobin.o
drivers/md/dm-roundrobin.o(.exit.text+0x0): In function
: multiple definition of `cleanup_module'
drivers/md/dm-mpath.o(.exit.text+0x0): first defined here
ld: Warning: size of symbol `cleanup_module' changed from 64 in
drivers/md/dm-mpath.o to 45 in drivers/md/dm-roundrobin.o
make[2]: *** [drivers/md/dm-multipath.o] Error 1
make[1]: *** [drivers/md] Error 2
make: *** [drivers] Error 2


Le vendredi 01 octobre 2004 à 23:21 +0100, Alasdair G Kergon a écrit :
> ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/2.6.9-rc2/2.6.9-rc2-udm2.tar.bz2
> A new patchset for multipath.
> This contains the final set of features I want us to work 
> on making stable and tidying up before the first submission 
> upstream.
> Main changes:
>   Removed the experimental path initialisation code for now:
>   will reinstate in a more generic way after the current set of 
>   features is ready for mainstream inclusion.
>   Device refs by major/minor numbers so userspace tools can be more
>   efficient e.g. dmsetup info -j 253 -m 1
>   Take device-mapper tools from CVS to take advantage of this.
>   [Userspace changes not thoroughly tested yet; a few 
>    commands require kernel changes for complete support.]
>   Reinstatement of failed paths directly - no need to reload the
>   whole table. e.g. 'dmsetup message mp1 2000 reinstate 253:4'
>   Path selector 'select' function returns how many times to use
>   path before being asked again; also enables crude
>   load-balancing.
>   e.g. 'multipath 1 round-robin 2 1 253:4 1000 253:3 2000'
>     (send 1000 I/O to first; 2000 to second)
>   0 means continue using a path till it fails.
>   It's still optional: 'round-robin 2 0 253:4 253:3'
>   Auto-loading of unknown path selectors.
> I've done some basic testing on this, but not much yet.
> In particular, I've not checked any module code, not reviewed
> all the uses of locks for correctness and not reviewed 
> what 'status' returns.
> The i386 kgdb patch (taken from -mm) is included for convenience.
> Alasdair
christophe varoqui <christophe varoqui free fr>

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