tree dae3cac48c76da789215cb9067559a7b721cbc5f
parent c04bc3d1f417a8a90eef9ab46523dfd44858b28d
author Roland Dreier <[EMAIL PROTECTED]> Sat, 20 Aug 2005 00:36:11 -0700
committer Roland Dreier <[EMAIL PROTECTED]> Sat, 27 Aug 2005 10:37:37 -0700
[PATCH] IB/mthca: Handle context tables smaller than our chunk size
When creating a table in context memory where the table is smaller
than our chunk size, we don't want to allocate and map a full chunk.
Instead, allocate just enough memory to cover the table.
This can be pretty simple because all tables are a power-of-2 size, so
either the table is a multiple of the chunk size, or it's smaller than
one chunk.
Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
drivers/infiniband/hw/mthca/mthca_memfree.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c
b/drivers/infiniband/hw/mthca/mthca_memfree.c
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -286,6 +286,7 @@ struct mthca_icm_table *mthca_alloc_icm_
{
struct mthca_icm_table *table;
int num_icm;
+ unsigned chunk_size;
int i;
u8 status;
@@ -306,7 +307,11 @@ struct mthca_icm_table *mthca_alloc_icm_
table->icm[i] = NULL;
for (i = 0; i * MTHCA_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) {
- table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >>
PAGE_SHIFT,
+ chunk_size = MTHCA_TABLE_CHUNK_SIZE;
+ if ((i + 1) * MTHCA_TABLE_CHUNK_SIZE > nobj * obj_size)
+ chunk_size = nobj * obj_size - i *
MTHCA_TABLE_CHUNK_SIZE;
+
+ table->icm[i] = mthca_alloc_icm(dev, chunk_size >> PAGE_SHIFT,
(use_lowmem ? GFP_KERNEL :
GFP_HIGHUSER) |
__GFP_NOWARN);
if (!table->icm[i])
-
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