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- Minor context cleanup

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- Minor doc update


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@537 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2008-10-24 11:52:12 +00:00
parent 20658918dc
commit 6544d6716b
2 changed files with 9 additions and 9 deletions
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4
scst/README
View File

@@ -809,7 +809,9 @@ ISCSI-SCST driver also has its own iSCSI specific parameter for that.
4. Insrease speed of the target's backstorage.
5. Implement in SCST the dynamic I/O flow control.
5. Implement in SCST dynamic I/O flow control. See "Dynamic I/O flow
control" section on http://scst.sourceforge.net/contributing.html page
for possible idea how to do it.
To decrease device queue depth on Linux initiators run command:

14
scst/src/dev_handlers/scst_vdisk.c
View File

@@ -594,7 +594,7 @@ static void vdisk_free_thr_data(struct scst_thr_data_hdr *d)
}
static struct scst_vdisk_thr *vdisk_init_thr_data(
struct scst_tgt_dev *tgt_dev, bool atomic)
struct scst_tgt_dev *tgt_dev)
{
struct scst_vdisk_thr *res;
struct scst_vdisk_dev *virt_dev =
@@ -605,13 +605,11 @@ static struct scst_vdisk_thr *vdisk_init_thr_data(
EXTRACHECKS_BUG_ON(virt_dev->nullio);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 17)
res = kmem_cache_alloc(vdisk_thr_cachep,
atomic ? GFP_ATOMIC : GFP_KERNEL);
res = kmem_cache_alloc(vdisk_thr_cachep, GFP_KERNEL);
if (res != NULL)
memset(res, 0, sizeof(*res));
#else
res = kmem_cache_zalloc(vdisk_thr_cachep,
atomic ? GFP_ATOMIC : GFP_KERNEL);
res = kmem_cache_zalloc(vdisk_thr_cachep, GFP_KERNEL);
#endif
if (res == NULL) {
TRACE(TRACE_OUT_OF_MEM, "%s", "Unable to allocate struct "
@@ -743,7 +741,7 @@ static int vdisk_do_job(struct scst_cmd *cmd)
if (!virt_dev->nullio) {
d = scst_find_thr_data(cmd->tgt_dev);
if (unlikely(d == NULL)) {
thr = vdisk_init_thr_data(cmd->tgt_dev, scst_cmd_atomic(cmd));
thr = vdisk_init_thr_data(cmd->tgt_dev);
if (thr == NULL) {
scst_set_busy(cmd);
goto out_compl;
@@ -2000,8 +1998,8 @@ static struct iovec *vdisk_alloc_iv(struct scst_cmd *cmd,
iv_count = scst_get_buf_count(cmd);
if (iv_count > thr->iv_count) {
kfree(thr->iv);
thr->iv = kmalloc(sizeof(*thr->iv) * iv_count,
scst_cmd_atomic(cmd) ? GFP_ATOMIC : GFP_KERNEL);
/* It can't be called in atomic context */
thr->iv = kmalloc(sizeof(*thr->iv) * iv_count, GFP_KERNEL);
if (thr->iv == NULL) {
PRINT_ERROR("Unable to allocate iv (%d)", iv_count);
scst_set_busy(cmd);