Re: [patch 42/52] fs: icache per-cpu last_ino allocator

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

 



On Thu, Jun 24, 2010 at 06:19:49PM +0200, Andi Kleen wrote:
> On Fri, Jun 25, 2010 at 01:52:43AM +1000, Nick Piggin wrote:
> > 
> > That's right. More or less it just requires alloc_inode to be exported,
> > adding more branches in new_inode would not be a good way to go.
> 
> One test/branch shouldn't hurt much. 

If we go through filesystems anyway may as well just use alloc_inode.

 
> > > I guess the main customer is sockets only.
> > 
> > I guess. Sockets and ram based filesystems. Interestingly I don't know
> > really what it's for (in socket code it's mostly for reporting and
> > hashing it seems). It sure isn't guaranteed to be unique.
> 
> Maybe it could be generated lazily on access for those?
> I suppose stat on a socket is relatively rare.
> The only problem is would need an accessor.
> 
> But ok out of scope.

Yea that might work. sock_i_ino() and ->dname covers a lot.


> > Well I think glibc will convert 64 bit stat struct to 32bit for
> > old apps. It detects if the ino can't fit in 32 bits.
> 
> ... and will fail the stat.

Which is what we're trying to avoid, I guess.

--
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