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Pack zrlock_t by 8 bytes 

On FreeBSD this reduces this structure size from 64 to 56 bytes.
dnode_handle_t respectively reduces from 72 to 64 bytes. It sounds
like a waste to need 72 bytes to be able to relocate 808 bytes of
dnode_t, which relocation on FreeBSD is not even supported.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:  Alexander Motin <mav@FreeBSD.org>
Sponsored by:   iXsystems, Inc.
Closes #14317
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Alexander Motin 2023-01-05 12:31:55 -05:00 committed by GitHub
parent 792a6ee462
commit db832c47fe
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1 changed files with 1 additions and 2 deletions
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3
include/sys/zrlock.h
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@ -34,9 +34,8 @@ extern "C" {
typedef struct zrlock {
kmutex_t zr_mtx;
volatile int32_t zr_refcount;
kcondvar_t zr_cv;
uint16_t zr_pad;
volatile int32_t zr_refcount;
#ifdef ZFS_DEBUG
kthread_t *zr_owner;
const char *zr_caller;