[PATCH 19/29] xfs: support nowait memory allocation in _xfs_buf_alloc()

Hao Xu
2023-08-25T14:04:07Z

Choose different gfp flags to support nowait memory allocation in
_xfs_buf_alloc().

Signed-off-by: Hao Xu <howeyxu@tencent.com>
---
fs/xfs/xfs_buf.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 9f84bc3b802c..8b800ce28996 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -220,9 +220,14 @@ _xfs_buf_alloc(
struct xfs_buf *bp;
int error;
int i;
+ bool nowait = flags & XBF_NOWAIT;
+ gfp_t gfp_flags = GFP_NOFS |
+ (nowait ? 0 : __GFP_NOFAIL);

*bpp = NULL;
- bp = kmem_cache_zalloc(xfs_buf_cache, GFP_NOFS | __GFP_NOFAIL);
+ bp = kmem_cache_zalloc(xfs_buf_cache, gfp_flags);
+ if (!bp)
+ return -EAGAIN;

/*
* We don't want certain flags to appear in b_flags unless they are
--
2.25.1