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Pass flags to more DMU write/hold functions

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Over the time many of DMU functions got flags argument to control
prefetch, caching, etc.  Few functions though left without it, even
though closer look shown that many of them do not require prefetch
due to their access pattern.  This patch adds the flags argument to
dmu_write(), dmu_buf_hold_array() and dmu_buf_hold_array_by_bonus(),
passing DMU_READ_NO_PREFETCH where applicable.

I am going to also pass DMU_UNCACHEDIO to some of them later.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com>
Closes #17872
This commit is contained in:
Alexander Motin
2025-10-29 14:17:51 -04:00
committed by GitHub
parent 3caf66c25b
commit dcada084b9
21 changed files with 69 additions and 47 deletions
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include/sys/dmu.h
+3 -3
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@@ -625,7 +625,7 @@ int dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
const void *tag, dmu_buf_t **, dmu_flags_t flags);
int dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset,
uint64_t length, int read, const void *tag, int *numbufsp,
dmu_buf_t ***dbpp);
dmu_buf_t ***dbpp, dmu_flags_t flags);
int dmu_buf_hold_noread(objset_t *os, uint64_t object, uint64_t offset,
const void *tag, dmu_buf_t **dbp);
int dmu_buf_hold_by_dnode(dnode_t *dn, uint64_t offset,
@@ -668,7 +668,7 @@ uint64_t dmu_buf_user_refcount(dmu_buf_t *db);
*/
int dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset,
uint64_t length, boolean_t read, const void *tag,
int *numbufsp, dmu_buf_t ***dbpp);
int *numbufsp, dmu_buf_t ***dbpp, dmu_flags_t flags);
void dmu_buf_rele_array(dmu_buf_t **, int numbufs, const void *tag);
typedef void dmu_buf_evict_func_t(void *user_ptr);
@@ -924,7 +924,7 @@ int dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
int dmu_read_by_dnode(dnode_t *dn, uint64_t offset, uint64_t size, void *buf,
dmu_flags_t flags);
void dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx);
const void *buf, dmu_tx_t *tx, dmu_flags_t flags);
int dmu_write_by_dnode(dnode_t *dn, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx, dmu_flags_t flags);
void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,