|
So now we're ready to merge into master? 发件人: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
发送时间: 2024年9月27日 4:25 收件人: mm-commits@xxxxxxxxxxxxxxx; 高翔; akpm@xxxxxxxxxxxxxxxxxxxx 主题: [External Mail]+ mm-cma-print-total-and-used-count-in-cma_alloc.patch added to mm-unstable branch [外部邮件] 此邮件来源于小米公司外部，请谨慎处理。若对邮件安全性存疑，请将邮件转发给misec@xxxxxxxxxx进行反馈
The patch titled Subject: mm/cma: print total and used count in cma_alloc() has been added to the -mm mm-unstable branch. Its filename is mm-cma-print-total-and-used-count-in-cma_alloc.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-cma-print-total-and-used-count-in-cma_alloc.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: gaoxiang17 <gaoxiang17@xxxxxxxxxx> Subject: mm/cma: print total and used count in cma_alloc() Date: Thu, 26 Sep 2024 20:00:49 +0800 To better understand cma area during debugging. before: [ 24.407814] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0) [ 24.413397] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0) [ 24.415886] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0) after: [ 24.097989] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 64, request count 1, align 0) [ 24.104260] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 65, request count 1, align 0) [ 24.107504] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 66, request count 1, align 0) Link: https://lkml.kernel.org/r/20240926120049.321514-1-gxxa03070307@xxxxxxxxx Signed-off-by: gaoxiang17 <gaoxiang17@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/cma.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) --- a/mm/cma.c~mm-cma-print-total-and-used-count-in-cma_alloc +++ a/mm/cma.c @@ -403,6 +403,17 @@ static void cma_debug_show_areas(struct spin_unlock_irq(&cma->lock); } +static unsigned long cma_get_used(struct cma *cma) +{ + unsigned long used; + + spin_lock_irq(&cma->lock); + used = bitmap_weight(cma->bitmap, (int)cma_bitmap_maxno(cma)); + spin_unlock_irq(&cma->lock); + + return used << cma->order_per_bit; +} + static struct page *__cma_alloc(struct cma *cma, unsigned long count, unsigned int align, gfp_t gfp) { @@ -420,8 +431,8 @@ static struct page *__cma_alloc(struct c if (!cma || !cma->count || !cma->bitmap) return page; - pr_debug("%s(cma %p, name: %s, count %lu, align %d)\n", __func__, - (void *)cma, cma->name, count, align); + pr_debug("%s(cma %p, name: %s, total count %lu, used count: %lu, request count %lu, align %d)\n", __func__, + (void *)cma, cma->name, cma->count, cma_get_used(cma), count, align); if (!count) return page; _ Patches currently in -mm which might be from gaoxiang17@xxxxxxxxxx are mm-cma-print-total-and-used-count-in-cma_alloc.patch |
