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[XFS] Retry linux inode cacech lookup if we found a stale inode. This 

fixes crashes under high nfs load

SGI-PV: 941429
SGI-Modid: xfs-linux:xfs-kern:197929a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Christoph Hellwig 2005-09-05 08:33:00 +10:00 committed by Nathan Scott
parent efa092f3d4
commit ba403ab43e
1 changed files with 16 additions and 12 deletions
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28
fs/xfs/xfs_iget.c
View File

@ -30,6 +30,8 @@
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include <linux/delay.h>
#include "xfs.h"
#include "xfs_macros.h"
@ -507,14 +509,13 @@ xfs_iget(
XFS_STATS_INC(xs_ig_attempts);
retry:
if ((inode = iget_locked(XFS_MTOVFS(mp)->vfs_super, ino))) {
bhv_desc_t *bdp;
xfs_inode_t *ip;
int newnode;
vp = LINVFS_GET_VP(inode);
if (inode->i_state & I_NEW) {
inode_allocate:
vn_initialize(inode);
error = xfs_iget_core(vp, mp, tp, ino, flags,
lock_flags, ipp, bno);
@ -525,22 +526,25 @@ inode_allocate:
iput(inode);
}
} else {
if (is_bad_inode(inode)) {
/*
* If the inode is not fully constructed due to
* filehandle mistmatches wait for the inode to go
* away and try again.
*
* iget_locked will call __wait_on_freeing_inode
* to wait for the inode to go away.
*/
if (is_bad_inode(inode) ||
((bdp = vn_bhv_lookup(VN_BHV_HEAD(vp),
&xfs_vnodeops)) == NULL)) {
iput(inode);
return EIO;
delay(1);
goto retry;
}
bdp = vn_bhv_lookup(VN_BHV_HEAD(vp), &xfs_vnodeops);
if (bdp == NULL) {
XFS_STATS_INC(xs_ig_dup);
goto inode_allocate;
}
ip = XFS_BHVTOI(bdp);
if (lock_flags != 0)
xfs_ilock(ip, lock_flags);
newnode = (ip->i_d.di_mode == 0);
if (newnode)
xfs_iocore_inode_reinit(ip);
XFS_STATS_INC(xs_ig_found);
*ipp = ip;
error = 0;