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Re: [PATCH] compsys maps anonymous memory and never frees it



On Sunday 07 September 2008, xRaich[o]²x wrote:
> 
> Bart Schaefer wrote:
> > On Sep 4,  1:04am, =?ISO-8859-1?Q?Bj=F6rn_Herzig?= wrote:
> > }
> > } I looked at the problem a little closer. Zsh does not call mmap to
> > } allocate them and they dont get allocated when completion happens but
> > } when the next command gets issued.
> >

I was able to more or less reproduce it on Linux; but now after your patch
I get what looks like memory leak. Here are heaps after several memory
intensive completions:

Address   Kbytes     RSS    Anon  Locked Mode   Mapping
08048000     608       -       -       - r-x--  zsh
080e0000      16       -       -       - rw---  zsh
080e4000      92       -       -       - rw---    [ anon ]
09d6a000     672       -       -       - rw---    [ anon ]

[...]

Address   Kbytes     RSS    Anon  Locked Mode   Mapping
08048000     608       -       -       - r-x--  zsh
080e0000      16       -       -       - rw---  zsh
080e4000      92       -       -       - rw---    [ anon ]
09d6a000    5340       -       -       - rw---    [ anon ]
b6a68000   15464       -       -       - rw---    [ anon ]


Compare this with version without patch:

Address   Kbytes     RSS    Anon  Locked Mode   Mapping
08048000     528       -       -       - r-x--  zsh
080cc000      16       -       -       - rw---  zsh
080d0000      88       -       -       - rw---    [ anon ]
099df000     744       -       -       - rw---    [ anon ]

[...]

Address   Kbytes     RSS    Anon  Locked Mode   Mapping
08048000     528       -       -       - r-x--  zsh
080cc000      16       -       -       - rw---  zsh
080d0000      88       -       -       - rw---    [ anon ]
099df000    5520       -       -       - rw---    [ anon ]
b6adb000   15464       -       -       - rw---    [ anon ]
b7a05000      12       -       -       - rw---    [ anon ]
b7b46000     108       -       -       - rw---    [ anon ]

So it looks like we still have some memory leak somewhere. 

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