Date: Wed, 27 Sep 2023 16:20:16 GMT From: Ed Maste <emaste@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 2f0b059eeafc - main - intrng: switch from MAXCPU to mp_ncpus Message-ID: <202309271620.38RGKGoX069240@gitrepo.freebsd.org>
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The branch main has been updated by emaste: URL: https://cgit.FreeBSD.org/src/commit/?id=2f0b059eeafc545a4ab1835d6a5290e1e2ebb47f commit 2f0b059eeafc545a4ab1835d6a5290e1e2ebb47f Author: Elliott Mitchell <ehem+freebsd@m5p.com> AuthorDate: 2023-09-26 17:06:04 +0000 Commit: Ed Maste <emaste@FreeBSD.org> CommitDate: 2023-09-27 16:19:37 +0000 intrng: switch from MAXCPU to mp_ncpus MAXCPU could be on the large side, while the hardware may not have many processors at all. As such only allocate counters for processors which actually exist, rather than always allocating for the maximum potentially allowed number. Reviewed by: markj, emaste Differential Revision: https://reviews.freebsd.org/D41462 --- sys/kern/subr_intr.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/sys/kern/subr_intr.c b/sys/kern/subr_intr.c index 6535c42f2404..49fe20cdc890 100644 --- a/sys/kern/subr_intr.c +++ b/sys/kern/subr_intr.c @@ -175,11 +175,11 @@ intr_irq_init(void *dummy __unused) /* * - 2 counters for each I/O interrupt. - * - MAXCPU counters for each IPI counters for SMP. + * - mp_maxid + 1 counters for each IPI counters for SMP. */ nintrcnt = intr_nirq * 2; #ifdef SMP - nintrcnt += INTR_IPI_COUNT * MAXCPU; + nintrcnt += INTR_IPI_COUNT * (mp_maxid + 1); #endif intrcnt = mallocarray(nintrcnt, sizeof(u_long), M_INTRNG, @@ -312,18 +312,18 @@ intr_ipi_setup_counters(const char *name) mtx_lock(&isrc_table_lock); /* - * We should never have a problem finding MAXCPU contiguous counters, - * in practice. Interrupts will be allocated sequentially during boot, - * so the array should fill from low to high index. Once reserved, the - * IPI counters will never be released. Similarly, we will not need to - * allocate more IPIs once the system is running. + * We should never have a problem finding mp_maxid + 1 contiguous + * counters, in practice. Interrupts will be allocated sequentially + * during boot, so the array should fill from low to high index. Once + * reserved, the IPI counters will never be released. Similarly, we + * will not need to allocate more IPIs once the system is running. */ - bit_ffc_area(intrcnt_bitmap, nintrcnt, MAXCPU, &index); + bit_ffc_area(intrcnt_bitmap, nintrcnt, mp_maxid + 1, &index); if (index == -1) panic("Failed to allocate %d counters. Array exhausted?", - MAXCPU); - bit_nset(intrcnt_bitmap, index, index + MAXCPU - 1); - for (i = 0; i < MAXCPU; i++) { + mp_maxid + 1); + bit_nset(intrcnt_bitmap, index, index + mp_maxid); + for (i = 0; i < mp_maxid + 1; i++) { snprintf(str, INTRNAME_LEN, "cpu%d:%s", i, name); intrcnt_setname(str, index + i); }
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