Re: [RFC][PATCHSET v3] non-recursive pathname resolution & RCU symlinks

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, May 16, 2015 at 8:12 PM, NeilBrown <neilb@xxxxxxx> wrote:
>
> The problem isn't getting intermediates.  The problem is that not having
> intermediates confuses the dcache.  When the dcache is just providing a
> caching service, and not providing a consistency service, then it shouldn't
> let itself get confused.

The dcache is much more than just a cache. It *is* in control. You may
not like it, but in the big picture, one odd filesystem not liking it
isn't a big deal.

Sorry, but that really is how it is. NFS isn't special enough for some
badly designed lookup models to matter one whit.  And caching si *so*
effective, that the actual lookup case isn't the primary thing.

Yes, you can find loads where caching doesn't work well. But they are
odd and not all that important. The cases where caches dominate are
*much* more common.

Designing things around the 1% case (or the 0.01%) would be completely
insane. The dcache and the vfs is designed for the 99.9% case.

           Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux