[pso] [tema3]put_super

[Catalin Morosan]

mda. am facut intai cu __bread() si apoi cu sb_bread() si vad ca in sfarsit trece testul din mark_buffer_dirty() dar totusi nu mi s-a actualizat superblockul pe disc...

alte sugestii? :D

----- Original Message ----
From: Octavian Purdila <tavi at cs.pub.ro>
To: pso at cursuri.cs.pub.ro
Sent: Monday, May 7, 2007 8:55:34 PM
Subject: Re: [pso] [tema3]put_super

On Monday 07 May 2007 20:42, Catalin Morosan wrote:
> Am mai analizat problema si se pare ca mie nu-mi trece testul din metoda
> mark_buffer_dirty().
>
> void fastcall mark_buffer_dirty(struct buffer_head *bh)
> {
>          if (!buffer_dirty(bh) && !test_set_buffer_dirty(bh))
>          __set_page_dirty_nobuffers(bh->b_page);
> }
>
> In primul rand, ce as putea face sa fac sa treaca testul de mai sus, si
> apoi, 
 
Daca nu iti trece testul inseamna ca bufferul e deja dirty. Daca nu se face 
flush la umount, inseamna ca bh-ul respectiv nu e asociat cu filesystemul. Il 
citesti cumva cu __brelse? Daca da, atunci trebuie sa il citesti cu sb_bread.

> de ce nu am acces la acele 2 metode buffer_dirty() si 
> test_set_buffer_dirty()? Nu le gasesc nicaieri in surse.

http://cs.pub.ro/~pso/lxr/source/include/linux/buffer_head.h?v=linux-2.6.18#073

http://cs.pub.ro/~pso/lxr/source/include/linux/buffer_head.h?v=linux-2.6.18#092
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