From: ebiederm@xmission.com (Eric W. Biederman)
To: "Amit S. Jain" <amitjain@tifr.res.in>
Cc: linux-mm@kvack.org
Subject: Re: Allocation of kernel memory >128K
Date: 11 Dec 2001 03:41:01 -0700 [thread overview]
Message-ID: <m1k7vuujia.fsf@frodo.biederman.org> (raw)
In-Reply-To: <Pine.LNX.4.21.0112111531110.5038-100000@mailhost.tifr.res.in>
"Amit S. Jain" <amitjain@tifr.res.in> writes:
> I have been working on a module in which I copy large amount of data fromn
> the user to the kernel area.To do so I allocate using either kmaaloc or
> vmalloc or get_free_pages()large amount of memory(in the range of
> MBytes) in the kernel space.However this attempt is not successful.One ofmy
> colleagues informed me that in the kernel space it is safe not to allocate
> large amount of memory at one time,should be kept upto 30K...is he
> right....could you throw more light on this issue.
large amounts of memory are o.k.
large amounts of continuous memory is generally a bad thing.
Allocating everything with multiple calls to get_free_page() should
get the job done.
Eric
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next prev parent reply other threads:[~2001-12-11 10:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-11 10:06 Amit S. Jain
2001-12-11 10:41 ` Eric W. Biederman [this message]
2001-12-12 7:40 ` Amit S. Jain
2001-12-20 3:56 ` Vladimir Dergachev
2001-12-27 11:08 ` Amit S. Jain
2002-01-03 22:59 ` Ravi K
2001-12-11 15:27 Mark_H_Johnson
2001-12-11 18:13 ` Benjamin LaHaise
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