Ingo Molnar a écrit :
* Steven Rostedt <[email protected]> wrote:
[...] Today's slab system is starting to become like the IDE where
nobody, but a select few sado-masochis, dare to venture in. (I've CC'd
them ;) [...]
while it could possibly be cleaned up a bit, it's one of the
best-optimized subsystems Linux has. Most of the "unnecessary
complexity" in SLAB is related to a performance or a debugging feature.
Many times i have looked at the SLAB code in a disassembler, right next
to profile output from some hot workload, and have concluded: 'I couldnt
do this any better even with hand-coded assembly'.
Well, I miss a version of kmem_cache_alloc()/kmem_cache_free() that wont play
with IRQ masking.
The local_irq_save()/local_irq_restore() pair is quite expensive and could be
avoided for several caches that are exclusively used in process context.
(Not speaking of general caches of course, but caches like dentry_cache, filp,
...)
Eric
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