Messages in this thread Patch in this message |  | | From | Gabriele Paoloni <> | Subject | [PATCH v2 2/5] x86/mce: move the mce_panic() call and 'kill_it' assignments to the right places | Date | Fri, 27 Nov 2020 16:18:16 +0000 |
| |
Right now for local MCEs we panic(),if needed, right after lmce is set. For global MCEs mce_reign() takes care of calling mce_panic(). Hence: - improve readibility by moving the conditional evaluation of tolerant up to when kill_it is set first; - move the mce_panic() call up into the statement where mce_end() fails.
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> --- arch/x86/kernel/cpu/mce/core.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 32b7099e3511..50e9b0893a92 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -1350,8 +1350,7 @@ noinstr void do_machine_check(struct pt_regs *regs) * severity is MCE_AR_SEVERITY we have other options. */ if (!(m.mcgstatus & MCG_STATUS_RIPV)) - kill_it = 1; - + kill_it = (cfg->tolerant == 3) ? 0 : 1; /* * Check if this MCE is signaled to only this logical processor, * on Intel, Zhaoxin only. @@ -1387,6 +1386,12 @@ noinstr void do_machine_check(struct pt_regs *regs) if (mce_end(order) < 0) { if (!no_way_out) no_way_out = worst >= MCE_PANIC_SEVERITY; + /* + * mce_reign() has probably failed hence evaluate if we need + * to panic + */ + if (no_way_out && mca_cfg.tolerant < 3) + mce_panic("Fatal machine check on current CPU", &m, msg); } } else { /* @@ -1403,15 +1408,6 @@ noinstr void do_machine_check(struct pt_regs *regs) } } - /* - * If tolerant is at an insane level we drop requests to kill - * processes and continue even when there is no way out. - */ - if (cfg->tolerant == 3) - kill_it = 0; - else if (no_way_out) - mce_panic("Fatal machine check on current CPU", &m, msg); - if (worst > 0) irq_work_queue(&mce_irq_work); -- 2.20.1 --------------------------------------------------------------------- INTEL CORPORATION ITALIA S.p.A. con unico socio Sede: Milanofiori Palazzo E 4 CAP 20094 Assago (MI) Capitale Sociale Euro 104.000,00 interamente versato Partita I.V.A. e Codice Fiscale 04236760155 Repertorio Economico Amministrativo n. 997124 Registro delle Imprese di Milano nr. 183983/5281/33 Soggetta ad attivita' di direzione e coordinamento di INTEL CORPORATION, USA This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
|  |