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Re: [Qemu-devel] [RFC 31/38] cpu: protect l1_map with tb_lock in full-sy
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From: |
Emilio G. Cota |
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Subject: |
Re: [Qemu-devel] [RFC 31/38] cpu: protect l1_map with tb_lock in full-system mode |
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Date: |
Tue, 25 Aug 2015 17:54:19 -0400 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sun, Aug 23, 2015 at 18:07:04 -0700, Paolo Bonzini wrote:
> On 23/08/2015 17:24, Emilio G. Cota wrote:
> > Note that user-only uses mmap_lock for this.
> >
> > Signed-off-by: Emilio G. Cota <address@hidden>
>
> Why is this needed? The RCU-like page_find should work just fine.
Ouch, you're right, forgot about that. Patch 30, which adds the
tb_lock assertions, should change as well to only check for
have_tb_lock in page_find when alloc==1.
Thanks,
Emilio
- Re: [Qemu-devel] [RFC 35/38] cputlb: use cpu_tcg_sched_work for tlb_flush_all, (continued)
- [Qemu-devel] [RFC 31/38] cpu: protect l1_map with tb_lock in full-system mode, Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 27/38] cpu-exec: convert tb_invalidated_flag into a per-TB flag, Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 33/38] cpu: introduce cpu_tcg_sched_work to run work while other CPUs sleep, Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 21/38] target-i386: emulate atomic instructions + barriers using AIE, Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 38/38] Revert "target-i386: yield to another VCPU on PAUSE", Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 37/38] cpus: remove async_run_safe_work_on_cpu, Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 32/38] cpu list: convert to RCU QLIST, Emilio G. Cota, 2015/08/23
- [Qemu-devel] [RFC 28/38] cpu-exec: use RCU to perform lockless TB lookups, Emilio G. Cota, 2015/08/23