[Crash-utility] 答复: [External Mail]Re: zram decompress support for gcore/crash-utility

[赵乾利]

Make the mistake cause by patch update....
please re-check the new patch

________________________________________
From: Dave Anderson <anderson at redhat.com>
Sent: Friday, April 10, 2020 22:57
To: 赵乾利
Cc: d hatayama; Discussion list for crash utility usage, maintenance and development
Subject: Re: 答复: [External Mail]Re: [Crash-utility] zram decompress support for gcore/crash-utility

----- Original Message -----
> I got little problem to compile 32-bit on my x86-64 host..
>  96 /usr/bin/ld: skipping incompatible
>  /usr/lib/gcc/x86_64-linux-gnu/4.8/libgcc.a when searching for -lgcc
>  97 /usr/bin/ld: cannot find -lgcc
>  98 /usr/bin/ld: skipping incompatible
>  /usr/lib/gcc/x86_64-linux-gnu/4.8/libgcc_s.so when searching for -lgcc_s
>  99 /usr/bin/ld: cannot find -lgcc_s
>
> I think i have fixed the build warning,but failed rebuild in 32-bit since
> above error,please help confirm,and move log to try_zram_decompress,please
> check the attachment.

The patch now compiles OK, but my first simple test shows that something
is obviously wrong with the patch.

Here are a set of user-space addresses that have been swapped out to disk:

  crash> set 1
      PID: 1
  COMMAND: "systemd"
     TASK: ffff92a13a1e8000  [THREAD_INFO: ffff92a13a260000]
      CPU: 2
    STATE: TASK_INTERRUPTIBLE
  crash> vm -p | grep SWAP
  55d917fb5000  SWAP: /dev/dm-2  OFFSET: 55827
  55d917fb7000  SWAP: /dev/dm-2  OFFSET: 55828
  55d917fc2000  SWAP: /dev/dm-2  OFFSET: 121359
  55d917fc6000  SWAP: /dev/dm-2  OFFSET: 88579
  55d917fcb000  SWAP: /dev/dm-2  OFFSET: 88581
  55d917fcc000  SWAP: /dev/dm-2  OFFSET: 88582
  55d917fcd000  SWAP: /dev/dm-2  OFFSET: 88583
  55d917fce000  SWAP: /dev/dm-2  OFFSET: 104963
  55d917fcf000  SWAP: /dev/dm-2  OFFSET: 104964
  ...

Obviously any read of the addresses above should fail, but each
read returns successfully, and each read is screwing up the internal
buffering scheme:

  crash> rd -u 55d917fb5000
      55d917fb5000:  0000000000000000                    ........
  WARNING: malloc/free mismatch (53/54)
  crash> rd -u 55d917fb7000
      55d917fb7000:  0000000000000000                    ........
  WARNING: malloc/free mismatch (53/55)
  crash> rd -u 55d917fc2000
      55d917fc2000:  0000000000000000                    ........
  WARNING: malloc/free mismatch (53/56)
  crash> rd -u 55d917fc6000
      55d917fc6000:  0000000000000000                    ........
  WARNING: malloc/free mismatch (53/57)
  crash>

Dave


#/******本邮件及其附件含有小米公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！ This e-mail and its attachments contain confidential information from XIAOMI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!******/#
-------------- next part --------------
A non-text attachment was scrubbed...
Name: crash-zram0411.zip
Type: application/zip
Size: 4359 bytes
Desc: crash-zram0411.zip
URL: <http://listman.redhat.com/archives/crash-utility/attachments/20200411/f584a8c9/attachment.zip>