Re: [BK][PATCH] Reiser4, will double Linux FS performance, pleaseapply

[Nikita Danilov <Nikita@Namesys.COM>]

Tomas Szepe writes:
 > > >> > This should help:
 > > >> > 
 > > >> > diff -Nru a/txnmgr.c b/txnmgr.c
 > > >> > --- a/txnmgr.c	Wed Oct 30 18:58:09 2002
 > > >> > +++ b/txnmgr.c	Fri Nov  1 20:13:27 2002
 > > >> > @@ -1917,7 +1917,7 @@
 > > >> >  		return;
 > > >> >  	}
 > > >> >  
 > > >> > -	if (!jnode_is_unformatted) {
 > > >> > +	if (jnode_is_znode(node)) {
 > > >> >  		if ( /**jnode_get_block(node) &&*/
 > > >> >  			   !blocknr_is_fake(jnode_get_block(node))) {
 > > >> >  			/* jnode has assigned real disk block. Put it into
 > > >> 
 > > >> 
 > > >> Jup, this fixes the leak, but free space still isn't reported accurately
 > > >> until after sync gets called, which I believe is a bug too.
 > > >
 > > >In reiser4 allocation of disk space is delayed to transaction commit. It
 > > >is not possible to estimate precisely amount of disk space that will be
 > > >allocated during commit, and hence statfs(2) results are not updated
 > > >until one does sync(2) (forcing commit) or transaction is committed due
 > > >to age (10 minutes by default).
 > > >
 > > The above is badly phrased, and the behavior complained of is indeed
 > > a bug not a feature.  Please fix.
 > 
 > I just noticed the file
 > http://thebsh.namesys.com/snapshots/2002.10.31/reiser4.diff
 > had changed, the difference from the original 20021031 snapshot being:
 > 
 > --- fs_reiser4.diff.old 2002-10-31 14:11:50.000000000 +0100
 > +++ fs_reiser4.diff.new 2002-11-04 16:57:46.000000000 +0100
 > @@ -46903,7 +46903,7 @@
 >  +#if REISER4_USER_LEVEL_SIMULATION
 >  +#    define check_spin_is_locked(s)     spin_is_locked(s)
 >  +#    define check_spin_is_not_locked(s) spin_is_not_locked(s)
 > -+#elif defined( CONFIG_DEBUG_SPINLOCK ) && defined( CONFIG_SMP )
 > ++#elif 0 && defined( CONFIG_DEBUG_SPINLOCK ) && defined( CONFIG_SMP )
 >  +#    define check_spin_is_not_locked(s) ( ( s ) -> owner != get_current() )
 >  +#    define spin_is_not_locked(s)       ( ( s ) -> owner == NULL )
 >  +#    define check_spin_is_locked(s)     ( ( s ) -> owner == get_current() )
 > 
 > So either someone is messing about with your webserver or you want multiple
 > versions of the supposedly same diff floating around (not exactly suitable

Looks like you managed to download early buggy version of diff that only
existed on the server for the short time and was overwritten in place
later (yes, silly thing to do).

 > for gathering bugreports, is it?).  If you're short on disk space, how about
 > gzipping the fs diff?  Squeezes down to ~500k from almost 2MB.

OK.

 > 

Nikita.