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Fix metaslab

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If your only going to allow one allocator to be used and it is defined
at compile time there is no point including the others in the build.
This patch could/should be refined for Linux to make the metaslab
configurable at run time.  That might be a bit tricky however since
you would need to quiese all IO.  Short of that making it configurable
as a module load option would be a reasonable compromise.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2010-08-26 10:27:53 -07:00
parent 98f72a539c
commit 22c81dd8a9
1 changed files with 20 additions and 0 deletions
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20
module/zfs/metaslab.c
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@ -30,6 +30,8 @@
#include <sys/vdev_impl.h> #include <sys/vdev_impl.h>
#include <sys/zio.h> #include <sys/zio.h>
#define WITH_NDF_BLOCK_ALLOCATOR
uint64_t metaslab_aliquot = 512ULL << 10; uint64_t metaslab_aliquot = 512ULL << 10;
uint64_t metaslab_gang_bang = SPA_MAXBLOCKSIZE + 1; /* force gang blocks */ uint64_t metaslab_gang_bang = SPA_MAXBLOCKSIZE + 1; /* force gang blocks */
@ -350,6 +352,9 @@ metaslab_segsize_compare(const void *x1, const void *x2)
return (0); return (0);
} }
#if defined(WITH_FF_BLOCK_ALLOCATOR) || \
defined(WITH_DF_BLOCK_ALLOCATOR) || \
defined(WITH_CDF_BLOCK_ALLOCATOR)
/* /*
* This is a helper function that can be used by the allocator to find * This is a helper function that can be used by the allocator to find
* a suitable block to allocate. This will search the specified AVL * a suitable block to allocate. This will search the specified AVL
@ -389,6 +394,7 @@ metaslab_block_picker(avl_tree_t *t, uint64_t *cursor, uint64_t size,
*cursor = 0; *cursor = 0;
return (metaslab_block_picker(t, cursor, size, align)); return (metaslab_block_picker(t, cursor, size, align));
} }
#endif /* WITH_FF/DF/CDF_BLOCK_ALLOCATOR */
static void static void
metaslab_pp_load(space_map_t *sm) metaslab_pp_load(space_map_t *sm)
@ -452,6 +458,7 @@ metaslab_pp_maxsize(space_map_t *sm)
return (ss->ss_end - ss->ss_start); return (ss->ss_end - ss->ss_start);
} }
#if defined(WITH_FF_BLOCK_ALLOCATOR)
/* /*
* ========================================================================== * ==========================================================================
* The first-fit block allocator * The first-fit block allocator
@ -484,6 +491,10 @@ static space_map_ops_t metaslab_ff_ops = {
metaslab_ff_fragmented metaslab_ff_fragmented
}; };
space_map_ops_t *zfs_metaslab_ops = &metaslab_ff_ops;
#endif /* WITH_FF_BLOCK_ALLOCATOR */
#if defined(WITH_DF_BLOCK_ALLOCATOR)
/* /*
* ========================================================================== * ==========================================================================
* Dynamic block allocator - * Dynamic block allocator -
@ -543,11 +554,15 @@ static space_map_ops_t metaslab_df_ops = {
metaslab_df_fragmented metaslab_df_fragmented
}; };
space_map_ops_t *zfs_metaslab_ops = &metaslab_df_ops;
#endif /* WITH_DF_BLOCK_ALLOCATOR */
/* /*
* ========================================================================== * ==========================================================================
* Other experimental allocators * Other experimental allocators
* ========================================================================== * ==========================================================================
*/ */
#if defined(WITH_CDF_BLOCK_ALLOCATOR)
static uint64_t static uint64_t
metaslab_cdf_alloc(space_map_t *sm, uint64_t size) metaslab_cdf_alloc(space_map_t *sm, uint64_t size)
{ {
@ -607,6 +622,10 @@ static space_map_ops_t metaslab_cdf_ops = {
metaslab_cdf_fragmented metaslab_cdf_fragmented
}; };
space_map_ops_t *zfs_metaslab_ops = &metaslab_cdf_ops;
#endif /* WITH_CDF_BLOCK_ALLOCATOR */
#if defined(WITH_NDF_BLOCK_ALLOCATOR)
uint64_t metaslab_ndf_clump_shift = 4; uint64_t metaslab_ndf_clump_shift = 4;
static uint64_t static uint64_t
@ -672,6 +691,7 @@ static space_map_ops_t metaslab_ndf_ops = {
}; };
space_map_ops_t *zfs_metaslab_ops = &metaslab_ndf_ops; space_map_ops_t *zfs_metaslab_ops = &metaslab_ndf_ops;
#endif /* WITH_NDF_BLOCK_ALLOCATOR */
/* /*
* ========================================================================== * ==========================================================================