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Fix stack noinline

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Certain function must never be automatically inlined by gcc because
they are stack heavy or called recursively.  This patch flags all
such functions I've found as 'noinline' to prevent gcc from making
the optimization.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2010-08-26 10:58:36 -07:00
parent 18a89ba43d
commit 60948de1ef
3 changed files with 21 additions and 7 deletions
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6
lib/libzpool/include/sys/zfs_context.h
View File

@ -75,6 +75,12 @@ extern "C" {
#include <sys/sysevent/dev.h>
#include <sys/sunddi.h>
/*
* Stack
*/
#define noinline __attribute__((noinline))
/*
* Debugging
*/

12
module/zfs/dbuf.c
View File

@ -2291,7 +2291,11 @@ dbuf_check_blkptr(dnode_t *dn, dmu_buf_impl_t *db)
}
}
static void
/* dbuf_sync_indirect() is called recursively from dbuf_sync_list() so it
* is critical the we not allow the compiler to inline this function in to
* dbuf_sync_list() thereby drastically bloating the stack usage.
*/
noinline static void
dbuf_sync_indirect(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
{
dmu_buf_impl_t *db = dr->dr_dbuf;
@ -2334,7 +2338,11 @@ dbuf_sync_indirect(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
zio_nowait(zio);
}
static void
/* dbuf_sync_leaf() is called recursively from dbuf_sync_list() so it is
* critical the we not allow the compiler to inline this function in to
* dbuf_sync_list() thereby drastically bloating the stack usage.
*/
noinline static void
dbuf_sync_leaf(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
{
arc_buf_t **datap = &dr->dt.dl.dr_data;

10
module/zfs/dmu_send.c
View File

@ -937,7 +937,7 @@ restore_read(struct restorearg *ra, int len)
return (rv);
}
static void
noinline static void
backup_byteswap(dmu_replay_record_t *drr)
{
#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
@ -1019,7 +1019,7 @@ backup_byteswap(dmu_replay_record_t *drr)
#undef DO32
}
static int
noinline static int
restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
{
int err;
@ -1103,7 +1103,7 @@ restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
}
/* ARGSUSED */
static int
noinline static int
restore_freeobjects(struct restorearg *ra, objset_t *os,
struct drr_freeobjects *drrfo)
{
@ -1127,7 +1127,7 @@ restore_freeobjects(struct restorearg *ra, objset_t *os,
return (0);
}
static int
noinline static int
restore_write(struct restorearg *ra, objset_t *os,
struct drr_write *drrw)
{
@ -1273,7 +1273,7 @@ restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
}
/* ARGSUSED */
static int
noinline static int
restore_free(struct restorearg *ra, objset_t *os,
struct drr_free *drrf)
{