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pnfs: align layoutget requests on page boundaries

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Signed-off-by: Benny Halevy <bhalevy@panasas.com>
This commit is contained in:
Benny Halevy 2011-05-22 19:47:46 +03:00 committed by Boaz Harrosh
parent fb3296eb46
commit 707ed5fdb5
1 changed files with 8 additions and 0 deletions
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8
fs/nfs/pnfs.c
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@ -850,6 +850,7 @@ pnfs_update_layout(struct inode *ino,
.offset = pos, .offset = pos,
.length = count, .length = count,
}; };
unsigned pg_offset;
struct nfs_inode *nfsi = NFS_I(ino); struct nfs_inode *nfsi = NFS_I(ino);
struct nfs_client *clp = NFS_SERVER(ino)->nfs_client; struct nfs_client *clp = NFS_SERVER(ino)->nfs_client;
struct pnfs_layout_hdr *lo; struct pnfs_layout_hdr *lo;
@ -899,6 +900,13 @@ pnfs_update_layout(struct inode *ino,
spin_unlock(&clp->cl_lock); spin_unlock(&clp->cl_lock);
} }
pg_offset = arg.offset & ~PAGE_CACHE_MASK;
if (pg_offset) {
arg.offset -= pg_offset;
arg.length += pg_offset;
}
arg.length = PAGE_CACHE_ALIGN(arg.length);
lseg = send_layoutget(lo, ctx, &arg, gfp_flags); lseg = send_layoutget(lo, ctx, &arg, gfp_flags);
if (!lseg && first) { if (!lseg && first) {
spin_lock(&clp->cl_lock); spin_lock(&clp->cl_lock);