From: Brian Foster <bfoster@redhat.com>
To: xfs@oss.sgi.com
Subject: [PATCH v3 3/7] xfs: cap prealloc size to free space before shift
Date: Tue, 19 Feb 2013 11:37:27 -0500 [thread overview]
Message-ID: <1361291851-24714-4-git-send-email-bfoster@redhat.com> (raw)
In-Reply-To: <1361291851-24714-1-git-send-email-bfoster@redhat.com>
With the addition of quota preallocation throttling, we want to
support a general algorithm that considers the maximum allowable
prealloc size and recommended shift modifier from various sources
(i.e., global fs state and all applicable quotas for an inode).
Update the current global free space throttle algorithm to cap the
preallocation size to the free space available in the filesystem.
Signed-off-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_iomap.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index daa08f6..3b41c18 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -412,6 +412,9 @@ xfs_iomap_prealloc_size(
if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT])
shift++;
}
+ if (alloc_blocks > freesp)
+ alloc_blocks = freesp;
+
if (shift)
alloc_blocks >>= shift;
/*
--
1.7.7.6
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next prev parent reply other threads:[~2013-02-19 16:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-19 16:37 [PATCH v3 0/7] speculative preallocation quota throttling Brian Foster
2013-02-19 16:37 ` [PATCH v3 1/7] xfs: reorganize xfs_iomap_prealloc_size to remove indentation Brian Foster
2013-02-19 16:37 ` [PATCH v3 2/7] xfs: push rounddown_pow_of_two() to after prealloc throttle Brian Foster
2013-02-19 16:37 ` Brian Foster [this message]
2013-02-19 21:48 ` [PATCH v3 3/7] xfs: cap prealloc size to free space before shift Dave Chinner
2013-02-19 22:29 ` Brian Foster
2013-02-19 23:19 ` Dave Chinner
2013-02-20 13:17 ` Brian Foster
2013-02-19 16:37 ` [PATCH v3 4/7] xfs: pass xfs_dquot to xfs_qm_adjust_dqlimits() instead of xfs_disk_dquot_t Brian Foster
2013-02-19 16:37 ` [PATCH v3 5/7] xfs: xfs_dquot prealloc throttling watermarks and low free space Brian Foster
2013-02-19 23:08 ` Dave Chinner
2013-02-20 13:17 ` Brian Foster
2013-02-19 16:37 ` [PATCH v3 6/7] xfs: add quota-driven speculative preallocation throttling Brian Foster
2013-02-19 16:37 ` [PATCH v3 7/7] xfs: xfs_iomap_prealloc_size() tracepoint Brian Foster
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