* Need some help regarding write_begin, write_end and writepage(s).
@ 2016-12-28 10:03 Pranay Srivastava
2016-12-29 7:05 ` Fwd: " Pranay Srivastava
0 siblings, 1 reply; 3+ messages in thread
From: Pranay Srivastava @ 2016-12-28 10:03 UTC (permalink / raw)
To: linux-fsdevel
Hello,
I'm trying to understand the write_begin, write_end and writepages /
writepage call
sequence by having a small file system coded myself.
I'm not using block_write_begin / block_write_end also not using
mpage_writepages
as well.
The issue however is that apart from write_begin and write_end, writepages never
gets called. However if I do write_inode_now ( in write_end) then writepage do
get called, but that's not how it's supposed to be.
1. in write_begin : I'm able to grab_cache_page_begin and returned it locked.
2. in write_end: I'm able to allocate disk space and do SetPageDirty
and SetPageUptodate
unlock_page and page_cache_release.
3. I also tried __mark_inode_dirty(inode, I_DIRTY_PAGES)
4. I also tried to set_page_writeback, but apparently that then makes
the iput_final stuck since
it waits for PG_Writeback to be cleared and that I've coded in
writepage which never
gets called.
but writepages never gets called.
Even iput_final doesn't make the write_inode_now call.
Any help would be appreciated.
Regards,
^ permalink raw reply [flat|nested] 3+ messages in thread
* Fwd: Need some help regarding write_begin, write_end and writepage(s).
2016-12-28 10:03 Need some help regarding write_begin, write_end and writepage(s) Pranay Srivastava
@ 2016-12-29 7:05 ` Pranay Srivastava
[not found] ` <102048.1483471700@turing-police.cc.vt.edu>
0 siblings, 1 reply; 3+ messages in thread
From: Pranay Srivastava @ 2016-12-29 7:05 UTC (permalink / raw)
To: kernelnewbies
Hello,
I'm trying to understand the write_begin, write_end and writepages /
writepage call
sequence by having a small file system coded myself.
I'm not using block_write_begin / block_write_end also not using
mpage_writepages
as well.
The issue however is that apart from write_begin and write_end, writepages never
gets called. However if I do write_inode_now ( in write_end) then writepage do
get called, but that's not how it's supposed to be.
1. in write_begin : I'm able to grab_cache_page_begin and returned it locked.
2. in write_end: I'm able to allocate disk space and do SetPageDirty
and SetPageUptodate
unlock_page and page_cache_release.
3. I also tried __mark_inode_dirty(inode, I_DIRTY_PAGES)
4. I also tried to set_page_writeback, but apparently that then makes
the iput_final stuck since
it waits for PG_Writeback to be cleared and that I've coded in
writepage which never
gets called.
but writepages never gets called.
Even iput_final doesn't make the write_inode_now call.
Any help would be appreciated.
Regards,
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-01-04 6:33 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2016-12-28 10:03 Need some help regarding write_begin, write_end and writepage(s) Pranay Srivastava
2016-12-29 7:05 ` Fwd: " Pranay Srivastava
[not found] ` <102048.1483471700@turing-police.cc.vt.edu>
2017-01-04 6:33 ` Pranay Srivastava
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