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MEMORY further remove memory reallocations

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added a few tweaks to further remove the need to memory
allocation resizing by preallocating the right buffer size.

Signed-off-by: Peter Lieven <pl@kamp.de>
This commit is contained in:
Peter Lieven
2012-11-17 19:40:46 +01:00
committed by Ronnie Sahlberg
parent 30804507f9
commit 9e05aecadd
2 changed files with 20 additions and 9 deletions
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5
lib/pdu.c
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@@ -44,6 +44,11 @@ iscsi_allocate_pdu_with_itt_flags_size(struct iscsi_context *iscsi, enum iscsi_o
pdu->outdata.size = ISCSI_HEADER_SIZE;
pdu->outdata.alloc_size = 64;
/* payload_size is limited by negotiated max_recv_data_segment_length */
if (payload_size > iscsi->target_max_recv_data_segment_length)
payload_size = iscsi->target_max_recv_data_segment_length;
while (pdu->outdata.alloc_size < ISCSI_HEADER_SIZE+payload_size) pdu->outdata.alloc_size<<=1;
pdu->outdata.data = iscsi_malloc(iscsi, pdu->outdata.alloc_size);
memset(pdu->outdata.data, 0, ISCSI_HEADER_SIZE);