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author | David Howells <dhowells@redhat.com> | 2021-12-22 17:21:04 +0000 |
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committer | David Howells <dhowells@redhat.com> | 2022-01-11 22:27:42 +0000 |
commit | d7bdba1c81f7e7bad12c7c7ce55afa3c7b0821ef (patch) | |
tree | de98c3b496b313d30c158cda12ad9a2eefdc0e55 /fs/nfs | |
parent | e6435f1e02f410e3507f02a37c0fbb17971ddc7c (diff) | |
download | linux-d7bdba1c81f7e7bad12c7c7ce55afa3c7b0821ef.tar.bz2 |
9p, afs, ceph, nfs: Use current_is_kswapd() rather than gfpflags_allow_blocking()
In 9p, afs ceph, and nfs, gfpflags_allow_blocking() (which wraps a
test for __GFP_DIRECT_RECLAIM being set) is used to determine if
->releasepage() should wait for the completion of a DIO write to fscache
with something like:
if (folio_test_fscache(folio)) {
if (!gfpflags_allow_blocking(gfp) || !(gfp & __GFP_FS))
return false;
folio_wait_fscache(folio);
}
Instead, current_is_kswapd() should be used instead.
Note that this is based on a patch originally by Zhaoyang Huang[1]. In
addition to extending it to the other network filesystems and putting it on
top of my fscache rewrite, it also needs to include linux/swap.h in a bunch
of places. Can current_is_kswapd() be moved to linux/mm.h?
Changes
=======
ver #5:
- Dropping the changes for cifs.
Originally-signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Co-developed-by: David Howells <dhowells@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
cc: Dominique Martinet <asmadeus@codewreck.org>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Steve French <smfrench@gmail.com>
cc: Trond Myklebust <trond.myklebust@hammerspace.com>
cc: linux-cachefs@redhat.com
cc: v9fs-developer@lists.sourceforge.net
cc: linux-afs@lists.infradead.org
cc: ceph-devel@vger.kernel.org
cc: linux-cifs@vger.kernel.org
cc: linux-nfs@vger.kernel.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/1638952658-20285-1-git-send-email-huangzhaoyang@gmail.com/ [1]
Link: https://lore.kernel.org/r/164021590773.640689.16777975200823659231.stgit@warthog.procyon.org.uk/ # v4
Diffstat (limited to 'fs/nfs')
-rw-r--r-- | fs/nfs/fscache.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index e0220fc40366..25a5c0f82392 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -8,6 +8,7 @@ #ifndef _NFS_FSCACHE_H #define _NFS_FSCACHE_H +#include <linux/swap.h> #include <linux/nfs_fs.h> #include <linux/nfs_mount.h> #include <linux/nfs4_mount.h> @@ -52,7 +53,7 @@ extern void __nfs_readpage_to_fscache(struct inode *, struct page *); static inline int nfs_fscache_release_page(struct page *page, gfp_t gfp) { if (PageFsCache(page)) { - if (!gfpflags_allow_blocking(gfp) || !(gfp & __GFP_FS)) + if (current_is_kswapd() || !(gfp & __GFP_FS)) return false; wait_on_page_fscache(page); fscache_note_page_release(nfs_i_fscache(page->mapping->host)); |