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Alexander Motin 80cc516295 ZAP: Massively switch to _by_dnode() interfaces

Before this change ZAP called dnode_hold() for almost every block
access, that was clearly visible in profiler under heavy load, such
as BRT.  This patch makes it always hold the dnode reference between
zap_lockdir() and zap_unlockdir().  It allows to avoid most of dnode
operations between those.  It also adds several new _by_dnode() APIs
to ZAP and uses them in BRT code.  Also adds dmu_prefetch_by_dnode()
variant and uses it in the ZAP code.

After this there remains only one call to dmu_buf_dnode_enter(),
which seems to be unneeded.  So remove the call and the functions.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #15951

2024-03-25 14:58:50 -07:00

avl

Suppress Clang Static Analyzer false positive in the AVL tree code.

2023-03-08 13:51:21 -08:00

icp

module/icp/asm-arm/sha2: enable non-SIMD asm kernels on armv5/6

2023-12-05 12:01:09 -08:00

lua

LUA: Backport CVE-2020-24370's patch

2024-02-07 11:53:05 -08:00

nvpair

nvpair: Constify string functions