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Re: [PATCH 0/6] fuse: allocate req->pages[] dynamically [message #47810 is a reply to message #47757]

Wed, 12 September 2012 16:07

Maxim Patlasov
Messages: 45
Registered: July 2012

Member

Hi Miklos,

So far as no objections appeared, I'll go ahead and replace fuse
req->page with req->pagevec. It will point to an array of structs:

struct page_vec {
struct page *pv_page;
unsigned int pv_len;
unsigned int pv_offset;
};

instead of 'struct page *' as it used to be. It seems to be what you
suggested in one of your comments. Are you OK about it?

Thanks,
Maxim

09/07/2012 09:40 PM, Maxim Patlasov пишет:
> Hi,
>
> Currently, any fuse request always includes inline pages[] array of
> FUSE_MAX_PAGES_PER_REQ elements. This is the waste of memory because
> in many cases smaller size would suffice.
>
> The patch-set tries to allocate only as many elements of pages[] array as
> actaully needed. This will be even more useful in the future because of:
>
> 1. Mitsuo's patches making maximum read/write request size tunable.
> 2. My patches optimizing scatter-gather direct IO. To make them simplier I'll
> need to substitute array of 'struct page *' with array of 'struct bio_vec'.
> It would make memory overhead worse if implemented w/o this patch-set.
>
> Thanks,
> Maxim
>

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[Message index]

		[PATCH 0/6] fuse: allocate req->pages[] dynamically By: Maxim Patlasov on Fri, 07 September 2012 17:40
		[PATCH 1/6] fuse: general infrastructure for pages[] of variable size By: Maxim Patlasov on Fri, 07 September 2012 17:41
		Re: [PATCH 1/6] fuse: general infrastructure for pages[] of variable size By: Miklos Szeredi on Wed, 12 September 2012 16:09
		[PATCH 2/6] fuse: categorize fuse_get_req() By: Maxim Patlasov on Fri, 07 September 2012 17:41
		Re: [PATCH 2/6] fuse: categorize fuse_get_req() By: Miklos Szeredi on Wed, 12 September 2012 16:20
		[PATCH 3/6] fuse: rework fuse_retrieve() By: Maxim Patlasov on Fri, 07 September 2012 17:41
		Re: [PATCH 3/6] fuse: rework fuse_retrieve() By: Miklos Szeredi on Wed, 12 September 2012 16:23
		[PATCH 4/6] fuse: rework fuse_readpages() By: Maxim Patlasov on Fri, 07 September 2012 17:41
		Re: [PATCH 4/6] fuse: rework fuse_readpages() By: Miklos Szeredi on Wed, 12 September 2012 16:41
		[PATCH 5/6] fuse: rework fuse_perform_write() By: Maxim Patlasov on Fri, 07 September 2012 17:41
		Re: [PATCH 5/6] fuse: rework fuse_perform_write() By: Miklos Szeredi on Wed, 12 September 2012 16:43
		[PATCH 6/6] fuse: rework fuse_do_ioctl() By: Maxim Patlasov on Fri, 07 September 2012 17:41
		Re: [PATCH 0/6] fuse: allocate req->pages[] dynamically By: Maxim Patlasov on Mon, 10 September 2012 10:18
		Re: [PATCH 0/6] fuse: allocate req->pages[] dynamically By: Maxim Patlasov on Wed, 12 September 2012 16:07
		Re: [PATCH 0/6] fuse: allocate req->pages[] dynamically By: Miklos Szeredi on Wed, 12 September 2012 16:49
		Re: [PATCH 0/6] fuse: allocate req->pages[] dynamically By: Maxim Patlasov on Fri, 14 September 2012 13:18
		Re: [PATCH 0/6] fuse: allocate req->pages[] dynamically By: Miklos Szeredi on Fri, 14 September 2012 14:39

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