NFSv4.2/pnfs: Use GFP_NOIO for layoutstat reporting in the writeback path

Prevent a potential deadlock.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index ba74b15..2a93bec 100644 (file)
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -510,7 +510,8 @@ nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror,
        spin_unlock(&mirror->lock);
 
        if (report)
-               pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode);
+               pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode,
+                               GFP_KERNEL);
 }
 
 static void
@@ -538,7 +539,8 @@ nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror,
        spin_unlock(&mirror->lock);
 
        if (report)
-               pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode);
+               pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode,
+                               GFP_NOIO);
 }
 
 static void

diff --cc fs/nfs/pnfs.c
Simple merge

diff --cc fs/nfs/pnfs.h
Simple merge