| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com>, Mark Wong <mark(at)2ndquadrant(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: stress test for parallel workers |
| Date: | 2019-12-11 02:22:41 |
| Message-ID: | CA+hUKG+WZddYR4U9y2W78Ge4tsr7MXrgAFtBeUvb91vBcDqMRQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Oct 15, 2019 at 4:50 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > Filed at
> > https://bugzilla.kernel.org/show_bug.cgi?id=205183
For the curious-and-not-subscribed, there's now a kernel patch
proposed for this. We guessed pretty close, but the problem wasn't
those dodgy looking magic numbers, it was that the bad stack expansion
check only allows for user space to expand the stack
(FAULT_FLAG_USER), and here the kernel itself wants to build a stack
frame.
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