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| From: | Richard Henderson |
| Subject: | Re: [PATCH v3 for-6.0 1/2] tcg: Do not set guard pages on the rx portion of code_gen_buffer |
| Date: | Mon, 22 Mar 2021 09:13:40 -0600 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 |
On 3/22/21 7:56 AM, Roman Bolshakov wrote:
- What does mean that rx might be covered by huge pages? (perhaps I'm
missing some context)
Huge pages are where a single level (n-1) page table entry covers the entire span that would be covered by m * level n page table entries.
On x86, this is a 2MB hugepage, vs 512 4kB pages. Most modern cpus support something similar.
See qemu_madvise(..., QEMU_MADV_HUGEPAGE). r~
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