Re: [RFC PATCH] linux-user: expand reserved brk space for 64bit guests

2022-01-26 Thread Richard Henderson
On 1/14/22 3:55 AM, Alex Bennée wrote: A recent change to fix commpage allocation issues on 32bit hosts revealed another intermittent issue on s390x. The root cause was the headroom we give for the brk space wasn't enough causing the guest to attempt to map something on top of QEMUs own pages. We

Re: [RFC PATCH] linux-user: expand reserved brk space for 64bit guests

2022-01-18 Thread Thomas Huth
On 13/01/2022 17.55, Alex Bennée wrote: A recent change to fix commpage allocation issues on 32bit hosts revealed another intermittent issue on s390x. The root cause was the headroom we give for the brk space wasn't enough causing the guest to attempt to map something on top of QEMUs own pages. W

[RFC PATCH] linux-user: expand reserved brk space for 64bit guests

2022-01-13 Thread Alex Bennée
A recent change to fix commpage allocation issues on 32bit hosts revealed another intermittent issue on s390x. The root cause was the headroom we give for the brk space wasn't enough causing the guest to attempt to map something on top of QEMUs own pages. We do not currently do anything to protect