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From: Feng Li <lifeng1519@gmail.com>
To: David Marchand <david.marchand@redhat.com>
Cc: Anatoly Burakov <anatoly.burakov@intel.com>,
	Li Feng <fengli@smartx.com>,  Kyle Zhang <kyle@smartx.com>,
	dev <dev@dpdk.org>,
	fanyang@smartx.com
Subject: Re: [dpdk-dev] [PATCH] eal: add madvise to avoid dump memory
Date: Tue, 21 Apr 2020 19:06:55 +0800	[thread overview]
Message-ID: <CAEK8JBCZrPZ6_FgZUNNtotPcsFFOn1_zEMHupUnJm7A72Z2u1w@mail.gmail.com> (raw)
In-Reply-To: <CAJFAV8x594kHFCD3Z2gv+KXaVOCqe5ugb_Ry09QuG44yZ=1ZsQ@mail.gmail.com>

Hi David,

Mmap with PROT_NONE does not affected the core dump size.

Here is a simple test prog:

#include <sys/mman.h>
#include <time.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char** argv) {
    // FIXME(fengli): XXXXX
    uint64_t gb = atoi(argv[1]);
    void* ptr = mmap(0, gb << 30, PROT_NONE, MAP_PRIVATE |
MAP_ANONYMOUS, -1, 0);
    if (ptr == (void*)-1) {
        perror("[-] mmap failed with MAP_PRIVATE | MAP_ANONYMOUS");
        exit(1);
    }
    while(1)
        sleep(1);
    return 0;
}

Thanks.

David Marchand <david.marchand@redhat.com> 于2020年4月21日周二 下午3:41写道:
>
> On Mon, Apr 20, 2020 at 11:41 AM Feng Li <lifeng1519@gmail.com> wrote:
> >
> > Thank you, Marchand,
>
> David is fine.
>
> >
> > I have just tested your patch, and it doesn't work.
> > The core dump file is still very very large, the same to virtual memory size.
>
> Please double check that the patch is in.
> I remember checking coredump size with my patch.
>
> This needs more investigation but I don't have time atm.
> Anatoly, opinion?
>
>
> --
> David Marchand
>

  reply	other threads:[~2020-04-21 21:55 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200420070508.645533-1-fengli@smartx.com>
2020-04-20  7:07 ` Li Feng
2020-04-20  7:13   ` David Marchand
2020-04-20  9:40     ` Feng Li
2020-04-21  7:41       ` David Marchand
2020-04-21 11:06         ` Feng Li [this message]
2020-04-21 12:19           ` Burakov, Anatoly
2020-04-21 16:38             ` Feng Li
2020-04-21 17:02               ` Burakov, Anatoly
2020-04-22  3:13                 ` Li Feng
2020-04-22  9:53                   ` Burakov, Anatoly
     [not found]                     ` <CAEK8JBCdfZJiKNjDNgC9nDGLni9Dvw+U1doRFnh+zkAs5TXEsg@mail.gmail.com>
2020-04-23 12:22                       ` Burakov, Anatoly
2020-04-23 15:43 ` [dpdk-dev] [PATCH v2] " Li Feng
2020-04-23 16:33   ` Burakov, Anatoly
2020-04-23 20:04     ` David Marchand
2020-04-24  9:12       ` Burakov, Anatoly
2020-04-24  9:14         ` Bruce Richardson
2020-04-24  9:33           ` Feng Li
2020-04-24 11:00             ` Burakov, Anatoly
2020-04-24 12:03               ` Li Feng

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