Re: [PATCH v12 00/10] enable bs > ps in XFS

David Howells
2024-08-16T19:31:22Z

Hi Pankaj,

I applied the first five patches and set minimum folio size for afs files to
8K (see attached patch) and ran some tests.

With simple tests, I can see in the trace log that it is definitely creating
8K folios where it would previously create 4K folios.

However, with 'xfstests -g quick', generic/075 generic/112 generic/393 fail
where they didn't previously. I won't be able to look into this more till
Monday.

If you want to try using afs for yourself, install the kafs-client package
(available on Fedora and Debian), do 'systemctl start afs.mount' and then you
can, say, do:

ls /afs/openafs.org/www/docs.openafs.org/

and browse the publicly accessible files under there.

David
---
commit d676df787baee3b710b9f0d284b21518473feb3c
Author: David Howells <dhowells@redhat.com>
Date: Fri Aug 16 19:54:25 2024 +0100

afs: [DEBUGGING] Set min folio order

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 3acf5e050072..c3842cba92e7 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -104,6 +104,7 @@ static int afs_inode_init_from_status(struct afs_operation *op,
inode->i_fop = &afs_file_operations;
inode->i_mapping->a_ops = &afs_file_aops;
mapping_set_large_folios(inode->i_mapping);
+ mapping_set_folio_min_order(inode->i_mapping, 1);
break;
case AFS_FTYPE_DIR:
inode->i_mode = S_IFDIR | (status->mode & S_IALLUGO);