From e8c8b3a79d85c22d3665b97dde843dc4d8d7ae37 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Wed, 2 Nov 2005 10:33:05 +1100 Subject: [XFS] Introduce two new mount options (nolargeio/largeio) to allow filesystems to expose the filesystem stripe width in stat(2) rather than the page cache size. This allows applications requiring high bandwidth to easily determine the optimum I/O size for the underlying filesystem. The default is to report the page cache size (i.e. "nolargeio"). SGI-PV: 942818 SGI-Modid: xfs-linux:xfs-kern:23830a Signed-off-by: David Chinner Signed-off-by: Nathan Scott --- fs/xfs/xfs_vnodeops.c | 35 +---------------------------------- 1 file changed, 1 insertion(+), 34 deletions(-) (limited to 'fs/xfs/xfs_vnodeops.c') diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index e2bf2ef58b6..8221b11a48c 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -181,40 +181,7 @@ xfs_getattr( vap->va_rdev = 0; if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) { - -#if 0 - /* Large block sizes confuse various - * user space programs, so letting the - * stripe size through is not a good - * idea for now. - */ - vap->va_blocksize = mp->m_swidth ? - /* - * If the underlying volume is a stripe, then - * return the stripe width in bytes as the - * recommended I/O size. - */ - (mp->m_swidth << mp->m_sb.sb_blocklog) : - /* - * Return the largest of the preferred buffer - * sizes since doing small I/Os into larger - * buffers causes buffers to be decommissioned. - * The value returned is in bytes. - */ - (1 << (int)MAX(mp->m_readio_log, - mp->m_writeio_log)); - -#else - vap->va_blocksize = - /* - * Return the largest of the preferred buffer - * sizes since doing small I/Os into larger - * buffers causes buffers to be decommissioned. - * The value returned is in bytes. - */ - 1 << (int)MAX(mp->m_readio_log, - mp->m_writeio_log); -#endif + vap->va_blocksize = xfs_preferred_iosize(mp); } else { /* -- cgit v1.2.3