From 1f6553f9f9b6e41375c605769a75bd1646685a1b Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Tue, 14 Mar 2006 13:30:48 +1100 Subject: [PATCH] [XFS] Dynamically allocate local kiocb structures in readv/writev routines to reduce stack footprint. SGI-PV: 947312 SGI-Modid: xfs-linux-melb:xfs-kern:25358a Signed-off-by: Nathan Scott --- fs/xfs/linux-2.6/xfs_file.c | 34 ++++++++++++++++++++++------------ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index ced4404339c..269995ddfbd 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -145,17 +145,22 @@ __linvfs_readv( { struct inode *inode = file->f_mapping->host; vnode_t *vp = LINVFS_GET_VP(inode); - struct kiocb kiocb; + struct kiocb *kiocb; ssize_t rval; - init_sync_kiocb(&kiocb, file); - kiocb.ki_pos = *ppos; + kiocb = kmalloc(sizeof(*kiocb), GFP_KERNEL); + if (unlikely(!kiocb)) + return -ENOMEM; + + init_sync_kiocb(kiocb, file); + kiocb->ki_pos = *ppos; if (unlikely(file->f_flags & O_DIRECT)) ioflags |= IO_ISDIRECT; - VOP_READ(vp, &kiocb, iov, nr_segs, &kiocb.ki_pos, ioflags, NULL, rval); + VOP_READ(vp, kiocb, iov, nr_segs, &kiocb->ki_pos, ioflags, NULL, rval); - *ppos = kiocb.ki_pos; + *ppos = kiocb->ki_pos; + kfree(kiocb); return rval; } @@ -190,17 +195,22 @@ __linvfs_writev( { struct inode *inode = file->f_mapping->host; vnode_t *vp = LINVFS_GET_VP(inode); - struct kiocb kiocb; + struct kiocb *kiocb; ssize_t rval; - init_sync_kiocb(&kiocb, file); - kiocb.ki_pos = *ppos; + kiocb = kmalloc(sizeof(*kiocb), GFP_KERNEL); + if (unlikely(!kiocb)) + return -ENOMEM; + + init_sync_kiocb(kiocb, file); + kiocb->ki_pos = *ppos; if (unlikely(file->f_flags & O_DIRECT)) ioflags |= IO_ISDIRECT; - VOP_WRITE(vp, &kiocb, iov, nr_segs, &kiocb.ki_pos, ioflags, NULL, rval); + VOP_WRITE(vp, kiocb, iov, nr_segs, &kiocb->ki_pos, ioflags, NULL, rval); - *ppos = kiocb.ki_pos; + *ppos = kiocb->ki_pos; + kfree(kiocb); return rval; } @@ -435,7 +445,7 @@ linvfs_ioctl( unsigned long arg) { int error; - struct inode *inode = filp->f_dentry->d_inode; + struct inode *inode = filp->f_dentry->d_inode; vnode_t *vp = LINVFS_GET_VP(inode); VOP_IOCTL(vp, inode, filp, 0, cmd, (void __user *)arg, error); @@ -457,7 +467,7 @@ linvfs_ioctl_invis( unsigned long arg) { int error; - struct inode *inode = filp->f_dentry->d_inode; + struct inode *inode = filp->f_dentry->d_inode; vnode_t *vp = LINVFS_GET_VP(inode); ASSERT(vp); -- 2.39.2