[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH 1/8] tcg: Clean up direct block chaining data fi

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 1/8] tcg: Clean up direct block chaining data fields
Date: Tue, 29 Mar 2016 10:14:57 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 29/03/2016 00:12, Richard Henderson wrote:
>> There is also a case where a TB jumps to itself; it then appears twice
>> in the list with different values in the low bits, such as this:
>>      tb->jmp_list_first = tb | 0;
>>       .--------------------'   |
>>       |                .-------'
>>      tb->jmp_list_next[0] = tb | 2;
> Of course, it begs the question of why TB would be in its own list, even
> if it does jump to itself.  We only need the points-to list in order to
> invalidate a TB and unlink it.  But if TB is being invalidated, we don't
> need to reset the jump within TB itself.

Isn't it just because TB acts as the list head in the circular list?  Or
am I misunderstanding you?


reply via email to

[Prev in Thread] Current Thread [Next in Thread]