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SubjectRe: [PATCH v2 3/3] fat: warn when discard request fails other than EOPNOTSUPP
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2012/11/5 OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>:
> Namjae Jeon <linkinjeon@gmail.com> writes:
>
>> FAT also warn user then the discard request fails
>> as ext4(http://patchwork.ozlabs.org/patch/192669/)
>
> Why don't we do this at block layer like normal bio?
Yes, maybe it will be better than doing in filesystem.
I will check more.
Thanks.
>
>> Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
>> Signed-off-by: Amit Sahrawat <amit.sahrawat83@gmail.com>
>> ---
>> fs/fat/fatent.c | 15 +++++++++------
>> 1 file changed, 9 insertions(+), 6 deletions(-)
>>
>> diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
>> index 260705c..fc1f407 100644
>> --- a/fs/fat/fatent.c
>> +++ b/fs/fat/fatent.c
>> @@ -583,12 +583,15 @@ int fat_free_clusters(struct inode *inode, int cluster)
>> */
>> if (cluster != fatent.entry + 1) {
>> int nr_clus = fatent.entry - first_cl + 1;
>> -
>> - sb_issue_discard(sb,
>> - fat_clus_to_blknr(sbi, first_cl),
>> - nr_clus * sbi->sec_per_clus,
>> - GFP_NOFS, 0);
>> -
>> + sector_t sblk = fat_clus_to_blknr(sbi, first_cl);
>> + sector_t nrblk = nr_clus * sbi->sec_per_clus;
>> +
>> + err = sb_issue_discard(sb,
>> + sblk, nrblk, GFP_NOFS, 0);
>> + if (err && err != -EOPNOTSUPP)
>> + fat_msg(sb, KERN_WARNING, "discard request for"
>> + " block:%llu count:%llu failed"
>> + " with %d", sblk, nrblk, err);
>> first_cl = cluster;
>> }
>> }
>
> --
> OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>


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