GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

xfs: factor out code to find the longest free extent in the AG

Browse source 
Signed-off-by: Dave Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Dave Chinner 2009-03-16 08:29:46 +01:00 • committed by Christoph Hellwig
parent cb4c8cc1e9
commit 6cc87645e2
4 changed files with 31 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

26
fs/xfs/xfs_alloc.c
View file

@ -1871,6 +1871,25 @@ xfs_alloc_compute_maxlevels(
mp->m_ag_maxlevels = level;
}
/*
* Find the length of the longest extent in an AG.
*/
xfs_extlen_t
xfs_alloc_longest_free_extent(
struct xfs_mount *mp,
struct xfs_perag *pag)
{
xfs_extlen_t need, delta = 0;
need = XFS_MIN_FREELIST_PAG(pag, mp);
if (need > pag->pagf_flcount)
delta = need - pag->pagf_flcount;
if (pag->pagf_longest > delta)
return pag->pagf_longest - delta;
return pag->pagf_flcount > 0 || pag->pagf_longest > 0;
}
/*
* Decide whether to use this allocation group for this allocation.
* If so, fix up the btree freelist's size.
@ -1923,15 +1942,12 @@ xfs_alloc_fix_freelist(
}
if (!(flags & XFS_ALLOC_FLAG_FREEING)) {
need = XFS_MIN_FREELIST_PAG(pag, mp);
delta = need > pag->pagf_flcount ? need - pag->pagf_flcount : 0;
/*
* If it looks like there isn't a long enough extent, or enough
* total blocks, reject it.
*/
longest = (pag->pagf_longest > delta) ?
(pag->pagf_longest - delta) :
(pag->pagf_flcount > 0 || pag->pagf_longest > 0);
need = XFS_MIN_FREELIST_PAG(pag, mp);
longest = xfs_alloc_longest_free_extent(mp, pag);
if ((args->minlen + args->alignment + args->minalignslop - 1) >
longest ||
((int)(pag->pagf_freeblks + pag->pagf_flcount -