Linux-XFS Archive on lore.kernel.org
 help / color / Atom feed
From: "Darrick J. Wong" <djwong@kernel.org>
To: djwong@kernel.org
Cc: linux-xfs@vger.kernel.org, hch@infradead.org,
	david@fromorbit.com, bfoster@redhat.com
Subject: [PATCH 11/11] xfs: flush speculative space allocations when we run out of space
Date: Wed, 27 Jan 2021 22:03:23 -0800
Message-ID: <161181380328.1525026.14172897140148764735.stgit@magnolia> (raw)
In-Reply-To: <161181374062.1525026.14717838769921652940.stgit@magnolia>

From: Darrick J. Wong <djwong@kernel.org>

If a fs modification (creation, file write, reflink, etc.) is unable to
reserve enough space to handle the modification, try clearing whatever
space the filesystem might have been hanging onto in the hopes of
speeding up the filesystem.  The flushing behavior will become
particularly important when we add deferred inode inactivation because
that will increase the amount of space that isn't actively tied to user
data.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/xfs_trans.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)


diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 7d4823cbd7c0..eb39baddff35 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -23,6 +23,7 @@
 #include "xfs_inode.h"
 #include "xfs_dquot_item.h"
 #include "xfs_dquot.h"
+#include "xfs_icache.h"
 
 kmem_zone_t	*xfs_trans_zone;
 
@@ -288,6 +289,18 @@ xfs_trans_alloc(
 	tp->t_firstblock = NULLFSBLOCK;
 
 	error = xfs_trans_reserve(tp, resp, blocks, rtextents);
+	if (error == -ENOSPC) {
+		/*
+		 * We weren't able to reserve enough space for the transaction.
+		 * Flush the other speculative space allocations to free space.
+		 * Do not perform a synchronous scan because callers can hold
+		 * other locks.
+		 */
+		error = xfs_blockgc_free_space(mp, NULL);
+		if (error)
+			return error;
+		error = xfs_trans_reserve(tp, resp, blocks, rtextents);
+	}
 	if (error) {
 		xfs_trans_cancel(tp);
 		return error;


  parent reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28  6:02 [PATCHSET v5 00/11] xfs: try harder to reclaim space when we run out Darrick J. Wong
2021-01-28  6:02 ` [PATCH 01/11] xfs: trigger all block gc scans when low on quota space Darrick J. Wong
2021-01-28  6:02 ` [PATCH 02/11] xfs: don't stall cowblocks scan if we can't take locks Darrick J. Wong
2021-01-28  6:02 ` [PATCH 03/11] xfs: xfs_inode_free_quota_blocks should scan project quota Darrick J. Wong
2021-01-28  6:02 ` [PATCH 04/11] xfs: move and rename xfs_inode_free_quota_blocks to avoid conflicts Darrick J. Wong
2021-01-28  6:02 ` [PATCH 05/11] xfs: pass flags and return gc errors from xfs_blockgc_free_quota Darrick J. Wong
2021-01-28  6:02 ` [PATCH 06/11] xfs: flush eof/cowblocks if we can't reserve quota for file blocks Darrick J. Wong
2021-01-28  9:26   ` Christoph Hellwig
2021-01-28  6:03 ` [PATCH 07/11] xfs: flush eof/cowblocks if we can't reserve quota for inode creation Darrick J. Wong
2021-01-28  6:03 ` [PATCH 08/11] xfs: flush eof/cowblocks if we can't reserve quota for chown Darrick J. Wong
2021-01-28  6:03 ` [PATCH 09/11] xfs: add a tracepoint for blockgc scans Darrick J. Wong
2021-01-28  6:03 ` [PATCH 10/11] xfs: refactor xfs_icache_free_{eof,cow}blocks call sites Darrick J. Wong
2021-01-28  6:03 ` Darrick J. Wong [this message]
2021-01-28  9:26   ` [PATCH 11/11] xfs: flush speculative space allocations when we run out of space Christoph Hellwig
  -- strict thread matches above, loose matches on Subject: below --
2021-01-23 18:51 [PATCHSET v4 00/11] xfs: try harder to reclaim space when we run out Darrick J. Wong
2021-01-23 18:53 ` [PATCH 11/11] xfs: flush speculative space allocations when we run out of space Darrick J. Wong
2021-01-24  9:48   ` Christoph Hellwig
2021-01-25 18:46     ` Brian Foster
2021-01-25 20:02     ` Darrick J. Wong
2021-01-25 21:06       ` Brian Foster
2021-01-26  0:29         ` Darrick J. Wong
2021-01-27 16:57           ` Christoph Hellwig
2021-01-27 21:00             ` Darrick J. Wong
2021-01-18 22:11 [PATCHSET v3 00/11] xfs: try harder to reclaim space when we run out Darrick J. Wong
2021-01-18 22:12 ` [PATCH 11/11] xfs: flush speculative space allocations when we run out of space Darrick J. Wong

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=161181380328.1525026.14172897140148764735.stgit@magnolia \
    --to=djwong@kernel.org \
    --cc=bfoster@redhat.com \
    --cc=david@fromorbit.com \
    --cc=hch@infradead.org \
    --cc=linux-xfs@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-XFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-xfs/0 linux-xfs/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-xfs linux-xfs/ https://lore.kernel.org/linux-xfs \
		linux-xfs@vger.kernel.org
	public-inbox-index linux-xfs

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-xfs


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git