lkml.org 
[lkml]   [2022]   [Mar]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v3 13/20] netfs: Add a netfs inode context
Date
I found a couple of issues here:

Firstly, netfs_is_cache_enabled() causes the generic/522 xfstest to take 60s
longer. This can be fixed by:

- return fscache_cookie_valid(cookie) && fscache_cookie_enabled(cookie);
+ return fscache_cookie_valid(cookie) && cookie->cache_priv &&
+ fscache_cookie_enabled(cookie);

There's no point trying to do caching if there's no cache actually attached.
I wonder if I should actually make this change in fscache_cookie_enabled()
rather than here.


Secondly, the above causes netfs_skip_folio_read() to be skipped a lot more
often than it should, and this hides an incorrect change there. I made
netfs_skip_folio_read() copy the folio size into a variable to avoid issuing
the calculation multiple times, but I then gave the wrong length when clearing
the tail of the page. This can be fixed by:

- zero_user_segments(&folio->page, 0, offset, offset + len, len);
+ zero_user_segments(&folio->page, 0, offset, offset + len, plen);

David

\
 
 \ /
  Last update: 2022-03-16 10:07    [W:0.133 / U:0.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site