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authorBob Peterson <rpeterso@redhat.com>2012-07-19 14:12:40 +0200
committerSteven Whitehouse <swhiteho@redhat.com>2012-07-19 15:51:08 +0200
commit8e2e00473598dd5379d8408cb974dade000acafc (patch)
tree1f7bfdf0d07b6c0315bbd11ffee174742d66a459 /Makefile
parentGFS2: kernel panic with small gfs2 filesystems - 1 RG (diff)
downloadlinux-8e2e00473598dd5379d8408cb974dade000acafc.tar.xz
linux-8e2e00473598dd5379d8408cb974dade000acafc.zip
GFS2: Reduce file fragmentation
This patch reduces GFS2 file fragmentation by pre-reserving blocks. The resulting improved on disk layout greatly speeds up operations in cases which would have resulted in interlaced allocation of blocks previously. A typical example of this is 10 parallel dd processes, each writing to a file in a common dirctory. The implementation uses an rbtree of reservations attached to each resource group (and each inode). Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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