diff options
| author | Peter Lieven <pl@kamp.de> | 2014-04-28 17:18:32 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-04-29 11:15:01 +0200 |
| commit | 3d2acaa308bfab65329ef983654b302899bfb2b0 (patch) | |
| tree | 83f433e25ec0aba8e1a183151c4d63b8b1e2e296 /block/iscsi.c | |
| parent | 5917af812e9c4bd6500927b26efe8d3e2f267bd0 (diff) | |
block/iscsi: allow cluster_size of 4K and greater
depending on the target the opt_unmap_gran might be as low
as 4K. As we know use this also as a knob to activate the allocationmap
feature lower the barrier. The limit 4K (and not 512) is choosen
to avoid a potentially too big allocationmap.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'block/iscsi.c')
| -rw-r--r-- | block/iscsi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/iscsi.c b/block/iscsi.c index e8d26bb781..84bedfa8fc 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -1386,7 +1386,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, /* Guess the internal cluster (page) size of the iscsi target by the means * of opt_unmap_gran. Transfer the unmap granularity only if it has a * reasonable size */ - if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 && + if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 && iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { iscsilun->cluster_sectors = (iscsilun->bl.opt_unmap_gran * iscsilun->block_size) >> BDRV_SECTOR_BITS; |