517d98a6ed
OCF cannot allocate request map bigger than 4MiB (due to kmalloc limitations), thus we need to split bigger IOs into series smaller ones to reduce request map size. Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
89 lines
2.2 KiB
Bash
89 lines
2.2 KiB
Bash
#!/bin/bash
|
|
#
|
|
# Copyright(c) 2012-2021 Intel Corporation
|
|
# SPDX-License-Identifier: BSD-3-Clause-Clear
|
|
#
|
|
|
|
. $(dirname $3)/conf_framework
|
|
|
|
check() {
|
|
cur_name=$(basename $2)
|
|
config_file_path=$1
|
|
if compile_module $cur_name "bio_split(NULL, 0, 0, 0);" "linux/bio.h"
|
|
then
|
|
echo $cur_name "1" >> $config_file_path
|
|
elif compile_module $cur_name "bio_split(NULL, 0);" "linux/bio.h"
|
|
then
|
|
echo $cur_name "2" >> $config_file_path
|
|
else
|
|
echo $cur_name "X" >> $config_file_path
|
|
fi
|
|
}
|
|
|
|
apply() {
|
|
case "$1" in
|
|
"1")
|
|
add_function "
|
|
static inline struct bio *cas_bio_split(struct bio *bio, int sectors)
|
|
{
|
|
return bio_split(bio, sectors, GFP_NOIO, NULL);
|
|
}" ;;
|
|
"2")
|
|
add_function "
|
|
static inline struct bio *cas_bio_split(struct bio *bio, int sectors)
|
|
{
|
|
struct bio *split, copy;
|
|
int bytes = sectors << 9;
|
|
uint32_t idx, vecs = 0;
|
|
int ret;
|
|
|
|
copy = *bio;
|
|
copy.bi_io_vec = ©.bi_io_vec[copy.bi_idx];
|
|
copy.bi_vcnt -= copy.bi_idx;
|
|
copy.bi_idx = 0;
|
|
|
|
BUG_ON(bytes >= bio->bi_size);
|
|
|
|
// For simplicity we assume that split is alligned.
|
|
// Otherwise bvec modification would be required.
|
|
while (bytes) {
|
|
if (bytes >= bio_iovec_idx(©, vecs)->bv_len) {
|
|
bytes -= bio_iovec_idx(©, vecs)->bv_len;
|
|
vecs++;
|
|
} else {
|
|
vecs++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
split = bio_alloc_bioset(GFP_NOIO, vecs, NULL);
|
|
if (!split)
|
|
return NULL;
|
|
|
|
copy.bi_max_vecs = vecs;
|
|
__bio_clone(split, ©);
|
|
split->bi_size = sectors << 9;
|
|
split->bi_vcnt = vecs;
|
|
|
|
if (bio_integrity((©))) {
|
|
ret = bio_integrity_clone(split, bio, GFP_NOIO);
|
|
if (ret < 0) {
|
|
bio_put(split);
|
|
return NULL;
|
|
}
|
|
for (idx = 0, bytes = 0; idx < bio->bi_idx; idx++)
|
|
bytes += bio_iovec_idx(bio, idx)->bv_len;
|
|
bio_integrity_trim(split, bytes >> 9, sectors);
|
|
}
|
|
|
|
bio_advance(bio, split->bi_size);
|
|
|
|
return split;
|
|
}" ;;
|
|
*)
|
|
exit 1
|
|
esac
|
|
}
|
|
|
|
conf_run $@
|