[lkml]   [2018]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v5 0/6] fs/dcache: Track & limit # of negative dentries
On Sat, Jul 14, 2018 at 11:36 AM Al Viro <> wrote:
> OK, this
> /*
> * No ordinary (disk based) filesystem counts links as inodes;
> * but each new link needs a new dentry, pinning lowmem, and
> * tmpfs dentries cannot be pruned until they are unlinked.
> */
> ret = shmem_reserve_inode(inode->i_sb);
> if (ret)
> goto out;
> will probably help (on ramfs it won't, though).

Nobody who cares about memory use would use ramfs and then allow
random users on it.

I think you can exhaust memory more easily on ramfs by just writing a
huge file. Do we have any limits at all?

ramfs is fine for things like initramfs, but I think the comment says it all:

* NOTE! This filesystem is probably most useful
* not as a real filesystem, but as an example of
* how virtual filesystems can be written.

and even that comment may have been more correct back in 2000 than it is today.

 \ /
  Last update: 2018-07-15 22:07    [W:0.075 / U:0.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site