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authorAkinobu Mita <akinobu.mita@gmail.com>2014-10-10 02:26:53 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-10 06:25:53 +0400
commit59d43914ed7b96255271ad6b7b735344beffa3c0 (patch)
tree83497d5e1b25c77fc222d5845b584c258857fde5 /fs/mpage.c
parent21bb9bd19430a43e6462ce75030fd7fac4b766ef (diff)
downloadlinux-59d43914ed7b96255271ad6b7b735344beffa3c0.tar.xz
vfs: make guard_bh_eod() more generic
This patchset implements readpages() operation for block device by using mpage_readpages() which can create multipage BIOs instead of BIOs for each page and reduce system CPU time consumption. This patch (of 3): guard_bh_eod() is used in submit_bh() to allow us to do IO even on the odd last sectors of a device, even if the block size is some multiple of the physical sector size. This makes guard_bh_eod() more generic and renames it guard_bio_eod() so that we can use it without struct buffer_head argument. The reason for this change is that using mpage_readpages() for block device requires to add this guard check in mpage code. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/mpage.c')
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