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Die when journal_sector_buffer_count is too small

trace-sqes
Vitaliy Filippov 2020-05-24 17:22:12 +03:00
parent 36595eb669
commit 53f6aba3e6
3 changed files with 19 additions and 5 deletions
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20
blockstore_journal.cpp
View File

@ -6,18 +6,24 @@ blockstore_journal_check_t::blockstore_journal_check_t(blockstore_impl_t *bs)
sectors_required = 0;
next_pos = bs->journal.next_free;
next_sector = bs->journal.cur_sector;
first_sector = -1;
next_in_pos = bs->journal.in_sector_pos;
right_dir = next_pos >= bs->journal.used_start;
}
// Check if we can write <required> entries of <size> bytes and <data_after> data bytes after them to the journal
int blockstore_journal_check_t::check_available(blockstore_op_t *op, int required, int size, int data_after)
int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries_required, int size, int data_after)
{
int required = entries_required;
while (1)
{
int fits = (bs->journal.block_size - next_in_pos) / size;
if (fits > 0)
{
if (first_sector == -1)
{
first_sector = next_sector;
}
required -= fits;
next_in_pos += fits * size;
sectors_required++;
@ -38,10 +44,15 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int require
right_dir = false;
}
next_in_pos = 0;
if (bs->journal.sector_info[next_sector].usage_count > 0 ||
bs->journal.sector_info[next_sector].dirty)
next_sector = ((next_sector + 1) % bs->journal.sector_count);
if (next_sector == first_sector)
{
next_sector = ((next_sector + 1) % bs->journal.sector_count);
// next_sector may wrap when all sectors are flushed and the incoming batch is too big
// This is an error condition, we can't wait for anything in this case
throw std::runtime_error(
"Blockstore journal_sector_buffer_count="+std::to_string(bs->journal.sector_count)+
" is too small for a batch of "+std::to_string(entries_required)+" entries of "+std::to_string(size)+" bytes"
);
}
if (bs->journal.sector_info[next_sector].usage_count > 0 ||
bs->journal.sector_info[next_sector].dirty)
@ -107,6 +118,7 @@ journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type,
{
// Also select next sector buffer in memory
journal.cur_sector = ((journal.cur_sector + 1) % journal.sector_count);
assert(!journal.sector_info[journal.cur_sector].usage_count);
}
else
{

2
blockstore_journal.h
View File

@ -166,7 +166,7 @@ struct blockstore_journal_check_t
{
blockstore_impl_t *bs;
uint64_t next_pos, next_sector, next_in_pos;
int sectors_required;
int sectors_required, first_sector;
bool right_dir; // writing to the end or the beginning of the ring buffer
blockstore_journal_check_t(blockstore_impl_t *bs);

2
osd_primary_subops.cpp
View File

@ -2,6 +2,8 @@
void osd_t::autosync()
{
// FIXME Autosync based on the number of unstable writes to prevent
// "journal_sector_buffer_count is too low for this batch" errors
if (immediate_commit != IMMEDIATE_ALL && !autosync_op)
{
autosync_op = new osd_op_t();