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Reduce chunksize limit to 512k.

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This commit is contained in:
Alasdair Kergon 2005-09-29 15:50:51 +00:00
parent b277f1e95d
commit 2b96712ab7
3 changed files with 3 additions and 1 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.01.15 -
=================================
Reduce chunksize limit to 512k.
Fix chunksize field in reports.
Don't hide snapshots from default 'lvs' output.
Add is_dm_major() for use in duplicate device detection in lvmcache_add().

2
man/lvcreate.8
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@ -42,7 +42,7 @@ keep the contents of the original logical volume for backup purposes.
See \fBlvm\fP for common options.
.TP
.I \-c, \-\-chunksize ChunkSize
Power of 2 chunk size for the snapshot logical volume between 4k and 1024k.
Power of 2 chunk size for the snapshot logical volume between 4k and 512k.
.TP
.I \-C, \-\-contiguous y/n
Sets or resets the contiguous allocation policy for

1
tools/lvcreate.c
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@ -303,6 +303,7 @@ static int _read_params(struct lvcreate_params *lp, struct cmd_context *cmd,
return 0;
}
lp->chunk_size = 2 * arg_uint_value(cmd, chunksize_ARG, 8);
// FIXME Restrict chunk_size to power of 2 in range PAGE_SIZE up to 512k (=1024)
log_verbose("Setting chunksize to %d sectors.", lp->chunk_size);
if (!(lp->segtype = get_segtype_from_string(cmd, "snapshot"))) {