From: Jan Kara Subject: [PATCH 5/5] ext4: fix sleep inside spinlock issue with quota and dealloc (#14739) Date: Wed, 23 Dec 2009 18:27:56 +0100 Message-ID: <1261589276-1380-6-git-send-email-jack@suse.cz> References: <1261589276-1380-1-git-send-email-jack@suse.cz> Cc: linux-ext4@vger.kernel.org, tytso@mit.edu, Dmitry Monakhov , Jan Kara To: stable@kernel.org Return-path: Received: from cantor.suse.de ([195.135.220.2]:58477 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755554AbZLWR2I (ORCPT ); Wed, 23 Dec 2009 12:28:08 -0500 In-Reply-To: <1261589276-1380-1-git-send-email-jack@suse.cz> Sender: linux-ext4-owner@vger.kernel.org List-ID: From: Dmitry Monakhov Unlock i_block_reservation_lock before vfs_dq_reserve_block(). This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=14739 CC: Theodore Ts'o Signed-off-by: Dmitry Monakhov Signed-off-by: Jan Kara --- fs/ext4/inode.c | 11 +++++------ 1 files changed, 5 insertions(+), 6 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9307f4b..6b7735f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1764,19 +1764,17 @@ repeat: md_needed = mdblocks - EXT4_I(inode)->i_reserved_meta_blocks; total = md_needed + nrblocks; + spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); /* * Make quota reservation here to prevent quota overflow * later. Real quota accounting is done at pages writeout * time. */ - if (vfs_dq_reserve_block(inode, total)) { - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + if (vfs_dq_reserve_block(inode, total)) return -EDQUOT; - } if (ext4_claim_free_blocks(sbi, total)) { - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); if (ext4_should_retry_alloc(inode->i_sb, &retries)) { yield(); goto repeat; @@ -1784,10 +1782,11 @@ repeat: vfs_dq_release_reservation_block(inode, total); return -ENOSPC; } + spin_lock(&EXT4_I(inode)->i_block_reservation_lock); EXT4_I(inode)->i_reserved_data_blocks += nrblocks; - EXT4_I(inode)->i_reserved_meta_blocks = mdblocks;