97cc1025b1
This patch removes the two daemons, gfs2_scand and gfs2_glockd and replaces them with a shrinker which is called from the VM. The net result is that GFS2 responds better when there is memory pressure, since it shrinks the glock cache at the same rate as the VFS shrinks the dcache and icache. There are no longer any time based criteria for shrinking glocks, they are kept until such time as the VM asks for more memory and then we demote just as many glocks as required. There are potential future changes to this code, including the possibility of sorting the glocks which are to be written back into inode number order, to get a better I/O ordering. It would be very useful to have an elevator based workqueue implementation for this, as that would automatically deal with the read I/O cases at the same time. This patch is my answer to Andrew Morton's remark, made during the initial review of GFS2, asking why GFS2 needs so many kernel threads, the answer being that it doesn't :-) This patch is a net loss of about 200 lines of code. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 lines
356 B
Makefile
10 lines
356 B
Makefile
obj-$(CONFIG_GFS2_FS) += gfs2.o
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gfs2-y := acl.o bmap.o dir.o eaops.o eattr.o glock.o \
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glops.o inode.o log.o lops.o locking.o main.o meta_io.o \
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mount.o ops_address.o ops_dentry.o ops_export.o ops_file.o \
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ops_fstype.o ops_inode.o ops_super.o quota.o \
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recovery.o rgrp.o super.o sys.o trans.o util.o
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obj-$(CONFIG_GFS2_FS_LOCKING_DLM) += locking/dlm/
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