David Howells a9eb558a5b afs: Stop implementing ->writepage() ... We're trying to get rid of the ->writepage() hook[1]. Stop afs from using it by unlocking the page and calling afs_writepages_region() rather than folio_write_one(). A flag is passed to afs_writepages_region() to indicate that it should only write a single region so that we don't flush the entire file in ->write_begin(), but do add other dirty data to the region being written to try and reduce the number of RPC ops. This requires ->migrate_folio() to be implemented, so point that at filemap_migrate_folio() for files and also for symlinks and directories. This can be tested by turning on the afs_folio_dirty tracepoint and then doing something like: xfs_io -c "w 2223 7000" -c "w 15000 22222" -c "w 23 7" /afs/my/test/foo and then looking in the trace to see if the write at position 15000 gets stored before page 0 gets dirtied for the write at position 23. Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: Christoph Hellwig <hch@lst.de> cc: Matthew Wilcox <willy@infradead.org> cc: linux-afs@lists.infradead.org Link: https://lore.kernel.org/r/20221113162902.883850-1-hch@lst.de/ [1] Link: https://lore.kernel.org/r/166876785552.222254.4403222906022558715.stgit@warthog.procyon.org.uk/ # v1		2022-12-22 11:40:35 +00:00
..
addr_list.c
afs.h
afs_cm.h
afs_fs.h
afs_vl.h
callback.c
cell.c
cmservice.c
dir.c	afs: Stop implementing ->writepage()	2022-12-22 11:40:35 +00:00
dir_edit.c
dir_silly.c
dynroot.c
file.c	afs: Stop implementing ->writepage()	2022-12-22 11:40:35 +00:00
flock.c
fs_operation.c
fs_probe.c	afs: Fix lost servers_outstanding count	2022-12-22 11:40:35 +00:00
fsclient.c
inode.c
internal.h	afs: remove afs_cache_netfs and afs_zap_permits() declarations	2022-12-22 11:40:35 +00:00
Kconfig
main.c
Makefile
misc.c
mntpt.c
proc.c
protocol_afs.h
protocol_uae.h
protocol_yfs.h
rotate.c
rxrpc.c
security.c
server.c
server_list.c
super.c
vl_alias.c
vl_list.c
vl_probe.c
vl_rotate.c
vlclient.c
volume.c	afs: remove variable nr_servers	2022-12-22 11:40:35 +00:00
write.c	afs: Stop implementing ->writepage()	2022-12-22 11:40:35 +00:00
xattr.c
xdr_fs.h
yfsclient.c