lkml.org 
[lkml]   [2020]   [Sep]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] pmem: export the symbols __copy_user_flushcache and __copy_from_user_flushcache


On Wed, 16 Sep 2020, Dan Williams wrote:

> On Wed, Sep 16, 2020 at 10:24 AM Mikulas Patocka <mpatocka@redhat.com> wrote:
> >
> > > My first question about nvfs is how it compares to a daxfs with
> > > executables and other binaries configured to use page cache with the
> > > new per-file dax facility?
> >
> > nvfs is faster than dax-based filesystems on metadata-heavy operations
> > because it doesn't have the overhead of the buffer cache and bios. See
> > this: http://people.redhat.com/~mpatocka/nvfs/BENCHMARKS
>
> ...and that metadata problem is intractable upstream? Christoph poked
> at bypassing the block layer for xfs metadata operations [1], I just
> have not had time to carry that further.
>
> [1]: "xfs: use dax_direct_access for log writes", although it seems
> he's dropped that branch from his xfs.git

XFS is very big. I wanted to create something small.

Mikulas

\
 
 \ /
  Last update: 2020-09-16 20:08    [W:0.140 / U:1.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site