From: Alex Bennée Date: Fri, 28 Feb 2020 19:24:13 +0000 (+0000) Subject: accel/tcg: remove link between guest ram and TCG cache size X-Git-Tag: qemu-xen-4.14.0~116^2~2 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=47a2def4533a2807e48954abd50b32ecb1aaf29a;p=qemu-xen.git accel/tcg: remove link between guest ram and TCG cache size Basing the TB cache size on the ram_size was always a little heuristic and was broken by a1b18df9a4 which caused ram_size not to be fully realised at the time we initialise the TCG translation cache. The current DEFAULT_CODE_GEN_BUFFER_SIZE may still be a little small but follow-up patches will address that. Fixes: a1b18df9a4 Cc: Igor Mammedov Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson Tested-by: Philippe Mathieu-Daudé Reviewed-by: Niek Linnenbank Message-Id: <20200228192415.19867-3-alex.bennee@linaro.org> Signed-off-by: Richard Henderson --- diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 238b0e575b..5b66af783b 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -938,15 +938,7 @@ static inline size_t size_code_gen_buffer(size_t tb_size) { /* Size the buffer. */ if (tb_size == 0) { -#ifdef USE_STATIC_CODE_GEN_BUFFER tb_size = DEFAULT_CODE_GEN_BUFFER_SIZE; -#else - /* ??? Needs adjustments. */ - /* ??? If we relax the requirement that CONFIG_USER_ONLY use the - static buffer, we could size this on RESERVED_VA, on the text - segment size of the executable, or continue to use the default. */ - tb_size = (unsigned long)(ram_size / 4); -#endif } if (tb_size < MIN_CODE_GEN_BUFFER_SIZE) { tb_size = MIN_CODE_GEN_BUFFER_SIZE;