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[XFS] Dynamically allocate local kiocb structures in readv/writev routines

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to reduce stack footprint.

SGI-PV: 947312
SGI-Modid: xfs-linux-melb:xfs-kern:25358a

Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Nathan Scott 2006-03-14 13:30:48 +11:00
parent 0293ce3a9f
commit 1f6553f9f9
1 changed files with 22 additions and 12 deletions
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30
fs/xfs/linux-2.6/xfs_file.c
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@ -145,17 +145,22 @@ __linvfs_readv(
{ {
struct inode *inode = file->f_mapping->host; struct inode *inode = file->f_mapping->host;
vnode_t *vp = LINVFS_GET_VP(inode); vnode_t *vp = LINVFS_GET_VP(inode);
struct kiocb kiocb; struct kiocb *kiocb;
ssize_t rval; ssize_t rval;
init_sync_kiocb(&kiocb, file); kiocb = kmalloc(sizeof(*kiocb), GFP_KERNEL);
kiocb.ki_pos = *ppos; if (unlikely(!kiocb))
return -ENOMEM;
init_sync_kiocb(kiocb, file);
kiocb->ki_pos = *ppos;
if (unlikely(file->f_flags & O_DIRECT)) if (unlikely(file->f_flags & O_DIRECT))
ioflags |= IO_ISDIRECT; 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; return rval;
} }
@ -190,17 +195,22 @@ __linvfs_writev(
{ {
struct inode *inode = file->f_mapping->host; struct inode *inode = file->f_mapping->host;
vnode_t *vp = LINVFS_GET_VP(inode); vnode_t *vp = LINVFS_GET_VP(inode);
struct kiocb kiocb; struct kiocb *kiocb;
ssize_t rval; ssize_t rval;
init_sync_kiocb(&kiocb, file); kiocb = kmalloc(sizeof(*kiocb), GFP_KERNEL);
kiocb.ki_pos = *ppos; if (unlikely(!kiocb))
return -ENOMEM;
init_sync_kiocb(kiocb, file);
kiocb->ki_pos = *ppos;
if (unlikely(file->f_flags & O_DIRECT)) if (unlikely(file->f_flags & O_DIRECT))
ioflags |= IO_ISDIRECT; 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; return rval;
} }