xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xfs: force buffer writeback before blocking on the ilock in inode reclaim

Browse Source 
If we are doing synchronous inode reclaim we block the VM from making
progress in memory reclaim.  So if we encouter a flush locked inode
promote it in the delwri list and wake up xfsbufd to write it out now.
Without this we can get hangs of up to 30 seconds during workloads hitting
synchronous inode reclaim.

The scheme is copied from what we do for dquot reclaims.

Reported-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig
2011-11-29 12:06:14 -06:00
committed by Ben Myers
parent fa8b18edd7
commit 4dd2cb4a28
3 changed files with 33 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
fs/xfs/xfs_inode.c
View File

@@ -2835,6 +2835,27 @@ corrupt_out:
return XFS_ERROR(EFSCORRUPTED);
}
void
xfs_promote_inode(
struct xfs_inode *ip)
{
struct xfs_buf *bp;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
bp = xfs_incore(ip->i_mount->m_ddev_targp, ip->i_imap.im_blkno,
ip->i_imap.im_len, XBF_TRYLOCK);
if (!bp)
return;
if (XFS_BUF_ISDELAYWRITE(bp)) {
xfs_buf_delwri_promote(bp);
wake_up_process(ip->i_mount->m_ddev_targp->bt_task);
}
xfs_buf_relse(bp);
}
/*
* Return a pointer to the extent record at file index idx.
*/