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pnfs: force a layout commit when encountering busy segments during recall 

Expedite layout recall processing by forcing a layout commit when
we see busy segments.  Without it the layout recall might have to wait
until the VM decided to start writeback for the file, which can introduce
long delays.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
hifive-unleashed-5.1
Christoph Hellwig 2014-09-10 08:23:29 -07:00 committed by Trond Myklebust
parent 3a3908c8b0
commit 7c5d187581
2 changed files with 10 additions and 1 deletions
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8
fs/nfs/callback_proc.c
View File

@ -171,6 +171,13 @@ static u32 initiate_file_draining(struct nfs_client *clp,
goto out;
ino = lo->plh_inode;
spin_lock(&ino->i_lock);
pnfs_set_layout_stateid(lo, &args->cbl_stateid, true);
spin_unlock(&ino->i_lock);
pnfs_layoutcommit_inode(ino, false);
spin_lock(&ino->i_lock);
if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
pnfs_mark_matching_lsegs_invalid(lo, &free_me_list,
@ -178,7 +185,6 @@ static u32 initiate_file_draining(struct nfs_client *clp,
rv = NFS4ERR_DELAY;
else
rv = NFS4ERR_NOMATCHING_LAYOUT;
pnfs_set_layout_stateid(lo, &args->cbl_stateid, true);
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&free_me_list);
pnfs_put_layout_hdr(lo);

3
fs/nfs/pnfs.c
View File

@ -594,6 +594,9 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list,
dprintk("%s freeing layout for inode %lu\n", __func__,
lo->plh_inode->i_ino);
inode = lo->plh_inode;
pnfs_layoutcommit_inode(inode, false);
spin_lock(&inode->i_lock);
list_del_init(&lo->plh_bulk_destroy);
lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */